Skip to main contentSkip to main content
Register for more free articles.
Log in Sign up
Back to homepage
Subscriber Login
Keep reading with a digital access subscription.
Subscribe now
You have permission to edit this collection.
Edit
Arizona Daily Star
88°
  • Sign in
  • Subscribe Now
  • Manage account
  • Logout
    • Manage account
    • e-Newspaper
    • Logout
  • News
    • Sign up for newsletters
    • Local
    • Arizona
    • Business
    • Crime
    • Nation & World
    • Markets & Stocks
    • SaddleBrooke
    • Politics
    • Archives
    • News Tip
  • Arizona Daily Star
    • E-edition
    • E-edition-Tutorial
    • Archives
    • Special Sections
    • Merchandise
    • Circulars
    • Readers' Choice Awards
    • Buyer's Edge
  • Obituaries
    • Share Your Story
    • Recent Obituaries
    • Find an Obituary
  • Opinion
    • Submit a Letter
    • Submit guest opinion
    • Letters to the Editor
    • Opinion & Editorials
    • National Columnists
  • Sports
    • Arizona Wildcats
    • Greg Hansen
    • High Schools
    • Roadrunners
  • Lifestyles
    • Events Calendar
    • Arts & Theatre
    • Food & Cooking
    • Movies & TV
    • Movie Listings
    • Music
    • Comics
    • Games
    • Columns
    • Play
    • Home & Gardening
    • Health
    • Get Healthy
    • Parenting
    • Fashion
    • People
    • Pets
    • Travel
    • Faith
    • Retro Tucson
    • History
    • Travel
    • Outdoors & Rec
    • Community Pages
  • Brand Ave. Studios
  • Join the community
    • News tip
    • Share video
  • Buy & Sell
    • Place an Ad
    • Shop Local
    • Jobs
    • Homes
    • Marketplace
    • I Love A Deal
  • Shopping
  • Customer Service
    • Manage My Account
    • Newsletter Sign-Up
    • Subscribe
    • Contact us
  • Mobile Apps
  • Weather: Live Radar
  • Facebook
  • Twitter
  • Bluesky
  • YouTube
  • Pinterest
  • Instagram
© 2026 Lee Enterprises
Terms of Service | Privacy Policy
Arizona Daily Star
News+
Read Today's E-edition
Arizona Daily Star
News+
  • Log In
  • $1 for 3 months
    Subscribe Now
    • Manage account
    • e-Newspaper
    • Logout
  • E-edition
  • News
  • Obituaries
  • Opinion
  • Wildcats
  • Lifestyles
  • Newsletters
  • Comics & Puzzles
  • Buyer's Edge
  • Jobs
  • 88° Sunny
Share This
  • Facebook
  • Twitter
  • Bluesky
  • WhatsApp
  • SMS
  • Email
Counties projected to have the most extreme heat days in 2050
Share this
  • Facebook
  • Twitter
  • Bluesky
  • WhatsApp
  • SMS
  • Email
  • Print
Spotlight

Counties projected to have the most extreme heat days in 2050

  • Katelyn Leboff, Stacker
  • Mar 21, 2021
  • Mar 21, 2021 Updated Aug 17, 2021

These are the 50 U.S. counties projected to have the most extreme heat days in 2050, according to CDC data.

Counties projected to have the most extreme heat days in 2050

Counties projected to have the most extreme heat days in 2050

Climate change and global warming are nothing new—though, some are still in denial of the existence and negative impacts of these phenomena. Though the media lives for hyping up big weather phenomena, actual scientific research and data reveal the earth is, in fact, heating up at an alarming rate. Much of global warming is the product of greenhouse gas emissions caused by humans and their activities. In the 20th century, the world saw a 1.44-degree Fahrenheit increase in its mean surface temp. Since the 1970s, summer temperatures have been on a steady climb, increasing 0.4 degrees every 10 years in the U.S. and 2 degrees overall.

Not all areas are equal in terms of climate change. In the U.S., the fastest-warming regions are in Southern California and western Nevada, rising as much as 1.32 degrees Fahrenheit per decade and 5 degrees overall. Stacker put together a list of 50 U.S. counties projected to have the most extreme heat days in 2050 with data taken from the Centers for Disease Control and Prevention. These predictions were last updated in December of 2018. Extreme heat days are defined as days in which the max temperature hits above 100 or 90 Fahrenheit. The counties are ranked by the projected number of 100-degree days under a low emissions scenario with ties broken by 90-degree days under the same scenario. Keep reading to find out if your county, or a county near you, was hot enough to make the list.

You may also like: 50 common weather terms, explained

Canva

#49. Collingsworth County, Texas (tie)

#49. Collingsworth County, Texas (tie)

Projected 100° days in 2050:

- Low emissions scenario: 40 days (+8 days from 2016)

- High emissions scenario: 47 days (+15 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 117 days (+16 days from 2016)

- High emissions scenario: 123 days (+22 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 16 nights

- High emissions scenario: 26 nights

Canva

#49. Childress County, Texas (tie)

#49. Childress County, Texas (tie)

Projected 100° days in 2050:

- Low emissions scenario: 40 days (+1 days from 2016)

- High emissions scenario: 47 days (+8 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 117 days (+8 days from 2016)

- High emissions scenario: 123 days (+14 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 26 nights

- High emissions scenario: 39 nights

Canva

#48. Cottle County, Texas

#48. Cottle County, Texas

Projected 100° days in 2050:

- Low emissions scenario: 41 days (+1 days from 2016)

- High emissions scenario: 48 days (+8 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 121 days (+13 days from 2016)

- High emissions scenario: 127 days (+19 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 24 nights

- High emissions scenario: 36 nights

Aualliso // Wikimedia Commons

#47. Hardeman County, Texas

#47. Hardeman County, Texas

Projected 100° days in 2050:

- Low emissions scenario: 42 days (+2 days from 2016)

- High emissions scenario: 48 days (+8 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 117 days (+3 days from 2016)

- High emissions scenario: 123 days (+9 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 36 nights

- High emissions scenario: 49 nights

Billy Hathorn // Wikimedia Commons

#46. Baylor County, Texas

#46. Baylor County, Texas

Projected 100° days in 2050:

- Low emissions scenario: 42 days (-1 days from 2016)

- High emissions scenario: 49 days (+6 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 121 days (+10 days from 2016)

- High emissions scenario: 127 days (+16 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 35 nights

- High emissions scenario: 48 nights

 

USDA NRCS Texas // Wikimedia Commons

#45. Haskell County, Texas

#45. Haskell County, Texas

Projected 100° days in 2050:

- Low emissions scenario: 42 days (+4 days from 2016)

- High emissions scenario: 48 days (+10 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 129 days (+15 days from 2016)

- High emissions scenario: 135 days (+21 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 41 nights

- High emissions scenario: 54 nights

Canva

#44. Brooks County, Texas

#44. Brooks County, Texas

Projected 100° days in 2050:

- Low emissions scenario: 42 days (+24 days from 2016)

- High emissions scenario: 53 days (+35 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 173 days (+38 days from 2016)

- High emissions scenario: 182 days (+47 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 86 nights

- High emissions scenario: 106 nights

Canva

#43. Archer County, Texas

#43. Archer County, Texas

Projected 100° days in 2050:

- Low emissions scenario: 43 days (+5 days from 2016)

- High emissions scenario: 48 days (+10 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 118 days (+12 days from 2016)

- High emissions scenario: 122 days (+16 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 43 nights

- High emissions scenario: 55 nights

Canva

#42. Winkler County, Texas

#42. Winkler County, Texas

Projected 100° days in 2050:

- Low emissions scenario: 43 days (+2 days from 2016)

- High emissions scenario: 52 days (+11 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 141 days (+20 days from 2016)

- High emissions scenario: 149 days (+28 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 19 nights

- High emissions scenario: 31 nights

Canva

#41. Cotton County, Oklahoma

#41. Cotton County, Oklahoma

Projected 100° days in 2050:

- Low emissions scenario: 44 days (+12 days from 2016)

- High emissions scenario: 50 days (+18 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 117 days (+11 days from 2016)

- High emissions scenario: 121 days (+15 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 33 nights

- High emissions scenario: 44 nights

 

Crimsonedge34 // Wikimedia Commons

#40. King County, Texas

#40. King County, Texas

Projected 100° days in 2050:

- Low emissions scenario: 45 days (+4 days from 2016)

- High emissions scenario: 52 days (+11 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 128 days (+17 days from 2016)

- High emissions scenario: 134 days (+23 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 18 nights

- High emissions scenario: 29 nights

Aualliso // Wikimedia Commons

#39. Shasta County, California

#39. Shasta County, California

Projected 100° days in 2050:

- Low emissions scenario: 46 days (+25 days from 2016)

- High emissions scenario: 52 days (+31 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 106 days (+16 days from 2016)

- High emissions scenario: 110 days (+20 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 12 nights

- High emissions scenario: 17 nights

Canva

#38. Tehama County, California

#38. Tehama County, California

Projected 100° days in 2050:

- Low emissions scenario: 46 days (+10 days from 2016)

- High emissions scenario: 52 days (+16 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 110 days (+14 days from 2016)

- High emissions scenario: 114 days (+18 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 8 nights

- High emissions scenario: 13 nights

Canva

#37. Madera County, California

#37. Madera County, California

Projected 100° days in 2050:

- Low emissions scenario: 46 days (-20 days from 2016)

- High emissions scenario: 53 days (-13 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 116 days (+6 days from 2016)

- High emissions scenario: 120 days (+10 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 4 nights

- High emissions scenario: 6 nights

Canva

#36. Greer County, Oklahoma

#36. Greer County, Oklahoma

Projected 100° days in 2050:

- Low emissions scenario: 46 days (+19 days from 2016)

- High emissions scenario: 52 days (+25 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 118 days (+12 days from 2016)

- High emissions scenario: 123 days (+17 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 27 nights

- High emissions scenario: 38 nights

 

Crimsonedge34 // Wikimedia Commons

#35. Tillman County, Oklahoma

#35. Tillman County, Oklahoma

Projected 100° days in 2050:

- Low emissions scenario: 46 days (+9 days from 2016)

- High emissions scenario: 51 days (+14 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 119 days (+8 days from 2016)

- High emissions scenario: 123 days (+12 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 35 nights

- High emissions scenario: 47 nights

Crimsonedge34 // Wikimedia Commons

#34. Jackson County, Oklahoma

#34. Jackson County, Oklahoma

Projected 100° days in 2050:

- Low emissions scenario: 46 days (+8 days from 2016)

- High emissions scenario: 52 days (+14 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 120 days (+7 days from 2016)

- High emissions scenario: 125 days (+12 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 31 nights

- High emissions scenario: 42 nights

Canva

#33. Tulare County, California

#33. Tulare County, California

Projected 100° days in 2050:

- Low emissions scenario: 46 days (-44 days from 2016)

- High emissions scenario: 54 days (-36 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 122 days (-3 days from 2016)

- High emissions scenario: 126 days (+1 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 7 nights

- High emissions scenario: 11 nights

David Prasad // Flickr

#31. Foard County, Texas (tie)

#31. Foard County, Texas (tie)

Projected 100° days in 2050:

- Low emissions scenario: 46 days (-3 days from 2016)

- High emissions scenario: 53 days (+4 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 124 days (+11 days from 2016)

- High emissions scenario: 129 days (+16 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 37 nights

- High emissions scenario: 50 nights

Canva

#31. Kings County, California (tie)

#31. Kings County, California (tie)

Projected 100° days in 2050:

- Low emissions scenario: 46 days (-50 days from 2016)

- High emissions scenario: 53 days (-43 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 124 days (-3 days from 2016)

- High emissions scenario: 128 days (+1 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 6 nights

- High emissions scenario: 9 nights

 

Canva

#30. Wichita County, Texas

#30. Wichita County, Texas

Projected 100° days in 2050:

- Low emissions scenario: 47 days (+12 days from 2016)

- High emissions scenario: 52 days (+17 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 120 days (+14 days from 2016)

- High emissions scenario: 124 days (+18 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 45 nights

- High emissions scenario: 57 nights

Canva

#29. Wilbarger County, Texas

#29. Wilbarger County, Texas

Projected 100° days in 2050:

- Low emissions scenario: 47 days (+1 days from 2016)

- High emissions scenario: 53 days (+7 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 127 days (+9 days from 2016)

- High emissions scenario: 130 days (+12 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 43 nights

- High emissions scenario: 56 nights

Roy Luck // Flickr

#28. Stonewall County, Texas

#28. Stonewall County, Texas

Projected 100° days in 2050:

- Low emissions scenario: 47 days (+1 days from 2016)

- High emissions scenario: 54 days (+8 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 129 days (+11 days from 2016)

- High emissions scenario: 134 days (+16 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 25 nights

- High emissions scenario: 39 nights

Geoffrey Long // Wikimedia Commons

#27. McMullen County, Texas

#27. McMullen County, Texas

Projected 100° days in 2050:

- Low emissions scenario: 47 days (-6 days from 2016)

- High emissions scenario: 57 days (+4 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 166 days (+32 days from 2016)

- High emissions scenario: 172 days (+38 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 76 nights

- High emissions scenario: 93 nights

Larry D. Moore // Wikimedia Commons

#26. Harmon County, Oklahoma

#26. Harmon County, Oklahoma

Projected 100° days in 2050:

- Low emissions scenario: 48 days (+13 days from 2016)

- High emissions scenario: 55 days (+20 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 125 days (+15 days from 2016)

- High emissions scenario: 130 days (+20 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 21 nights

- High emissions scenario: 32 nights

 

Famartin // Wikimedia Commons

#25. Knox County, Texas

#25. Knox County, Texas

Projected 100° days in 2050:

- Low emissions scenario: 48 days (+1 days from 2016)

- High emissions scenario: 54 days (+7 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 134 days (+19 days from 2016)

- High emissions scenario: 139 days (+24 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 36 nights

- High emissions scenario: 50 nights

Nicholas Henderson // Flickr

#24. Graham County, Arizona

#24. Graham County, Arizona

Projected 100° days in 2050:

- Low emissions scenario: 50 days (+24 days from 2016)

- High emissions scenario: 60 days (+34 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 140 days (+36 days from 2016)

- High emissions scenario: 146 days (+42 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 12 nights

- High emissions scenario: 19 nights

southoma101 // Wikimedia Commons

#23. Washington County, Utah

#23. Washington County, Utah

Projected 100° days in 2050:

- Low emissions scenario: 53 days (+27 days from 2016)

- High emissions scenario: 62 days (+36 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 122 days (+28 days from 2016)

- High emissions scenario: 126 days (+32 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 12 nights

- High emissions scenario: 17 nights

Eric Ward // Wikimedia Commons

#22. Fresno County, California

#22. Fresno County, California

Projected 100° days in 2050:

- Low emissions scenario: 54 days (-29 days from 2016)

- High emissions scenario: 62 days (-21 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 125 days (+3 days from 2016)

- High emissions scenario: 128 days (+6 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 9 nights

- High emissions scenario: 13 nights

Canva

#21. Ward County, Texas

#21. Ward County, Texas

Projected 100° days in 2050:

- Low emissions scenario: 54 days (+4 days from 2016)

- High emissions scenario: 64 days (+14 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 154 days (+30 days from 2016)

- High emissions scenario: 162 days (+38 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 20 nights

- High emissions scenario: 34 nights

 

Canva

#20. Loving County, Texas

#20. Loving County, Texas

Projected 100° days in 2050:

- Low emissions scenario: 55 days (+3 days from 2016)

- High emissions scenario: 64 days (+12 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 150 days (+26 days from 2016)

- High emissions scenario: 158 days (+34 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 12 nights

- High emissions scenario: 23 nights

Canva

#19. Riverside County, California

#19. Riverside County, California

Projected 100° days in 2050:

- Low emissions scenario: 56 days (+24 days from 2016)

- High emissions scenario: 63 days (+31 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 129 days (+24 days from 2016)

- High emissions scenario: 133 days (+28 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 14 nights

- High emissions scenario: 17 nights

Daniel Orth // Flickr

#18. Kern County, California

#18. Kern County, California

Projected 100° days in 2050:

- Low emissions scenario: 58 days (-28 days from 2016)

- High emissions scenario: 65 days (-21 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 126 days (0 days from 2016)

- High emissions scenario: 130 days (+4 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 30 nights

- High emissions scenario: 36 nights

Canva

#17. Presidio County, Texas

#17. Presidio County, Texas

Projected 100° days in 2050:

- Low emissions scenario: 58 days (+44 days from 2016)

- High emissions scenario: 66 days (+52 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 149 days (+50 days from 2016)

- High emissions scenario: 157 days (+58 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 34 nights

- High emissions scenario: 46 nights

Canva

#16. Dimmit County, Texas

#16. Dimmit County, Texas

Projected 100° days in 2050:

- Low emissions scenario: 58 days (-5 days from 2016)

- High emissions scenario: 68 days (+5 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 171 days (+37 days from 2016)

- High emissions scenario: 178 days (+44 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 92 nights

- High emissions scenario: 107 nights

 

Canva

#15. Nye County, Nevada

#15. Nye County, Nevada

Projected 100° days in 2050:

- Low emissions scenario: 60 days (+19 days from 2016)

- High emissions scenario: 67 days (+26 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 124 days (+23 days from 2016)

- High emissions scenario: 129 days (+28 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 15 nights

- High emissions scenario: 20 nights

BLM Nevada // Wikimedia Commons

#14. Maverick County, Texas

#14. Maverick County, Texas

Projected 100° days in 2050:

- Low emissions scenario: 60 days (-2 days from 2016)

- High emissions scenario: 70 days (+8 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 167 days (+32 days from 2016)

- High emissions scenario: 174 days (+39 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 95 nights

- High emissions scenario: 109 nights

Canva

#13. La Salle County, Texas

#13. La Salle County, Texas

Projected 100° days in 2050:

- Low emissions scenario: 60 days (+2 days from 2016)

- High emissions scenario: 70 days (+12 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 173 days (+38 days from 2016)

- High emissions scenario: 181 days (+46 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 87 nights

- High emissions scenario: 103 nights

Larry D. Moore // Wikimedia Commons

#12. Reeves County, Texas

#12. Reeves County, Texas

Projected 100° days in 2050:

- Low emissions scenario: 68 days (+15 days from 2016)

- High emissions scenario: 78 days (+25 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 162 days (+35 days from 2016)

- High emissions scenario: 171 days (+44 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 15 nights

- High emissions scenario: 27 nights

Canva

#11. Zapata County, Texas

#11. Zapata County, Texas

Projected 100° days in 2050:

- Low emissions scenario: 73 days (+12 days from 2016)

- High emissions scenario: 86 days (+25 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 189 days (+53 days from 2016)

- High emissions scenario: 196 days (+60 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 102 nights

- High emissions scenario: 119 nights

You may also like: 30 incredible photos that show the true power of nature

Canva

#10. Starr County, Texas

#10. Starr County, Texas

Projected 100° days in 2050:

- Low emissions scenario: 73 days (+15 days from 2016)

- High emissions scenario: 86 days (+28 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 195 days (+55 days from 2016)

- High emissions scenario: 203 days (+63 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 102 nights

- High emissions scenario: 120 nights

Canva

#9. Pima County, Arizona

#9. Pima County, Arizona

Projected 100° days in 2050:

- Low emissions scenario: 75 days (+37 days from 2016)

- High emissions scenario: 85 days (+47 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 164 days (+53 days from 2016)

- High emissions scenario: 169 days (+58 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 43 nights

- High emissions scenario: 53 nights

Canva

#8. Mohave County, Arizona

#8. Mohave County, Arizona

Projected 100° days in 2050:

- Low emissions scenario: 79 days (+12 days from 2016)

- High emissions scenario: 86 days (+19 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 145 days (+26 days from 2016)

- High emissions scenario: 149 days (+30 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 57 nights

- High emissions scenario: 62 nights

Zzyzx // Wikimedia Commons

#7. Webb County, Texas

#7. Webb County, Texas

Projected 100° days in 2050:

- Low emissions scenario: 79 days (+27 days from 2016)

- High emissions scenario: 91 days (+39 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 189 days (+53 days from 2016)

- High emissions scenario: 195 days (+59 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 115 nights

- High emissions scenario: 129 nights

Canva

#6. Clark County, Nevada

#6. Clark County, Nevada

Projected 100° days in 2050:

- Low emissions scenario: 88 days (+25 days from 2016)

- High emissions scenario: 95 days (+32 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 147 days (+35 days from 2016)

- High emissions scenario: 151 days (+39 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 51 nights

- High emissions scenario: 59 nights

 

mitchellma // Wikimedia Commons

#5. Pinal County, Arizona

#5. Pinal County, Arizona

Projected 100° days in 2050:

- Low emissions scenario: 111 days (+35 days from 2016)

- High emissions scenario: 118 days (+42 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 180 days (+49 days from 2016)

- High emissions scenario: 184 days (+53 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 64 nights

- High emissions scenario: 72 nights

Canva

#4. Maricopa County, Arizona

#4. Maricopa County, Arizona

Projected 100° days in 2050:

- Low emissions scenario: 115 days (+24 days from 2016)

- High emissions scenario: 122 days (+31 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 182 days (+47 days from 2016)

- High emissions scenario: 186 days (+51 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 77 nights

- High emissions scenario: 84 nights

Canva

#3. La Paz County, Arizona

#3. La Paz County, Arizona

Projected 100° days in 2050:

- Low emissions scenario: 120 days (+28 days from 2016)

- High emissions scenario: 124 days (+32 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 181 days (+46 days from 2016)

- High emissions scenario: 184 days (+49 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 84 nights

- High emissions scenario: 90 nights

Canva

#2. Imperial County, California

#2. Imperial County, California

Projected 100° days in 2050:

- Low emissions scenario: 127 days (+15 days from 2016)

- High emissions scenario: 131 days (+19 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 192 days (+52 days from 2016)

- High emissions scenario: 195 days (+55 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 76 nights

- High emissions scenario: 82 nights

Public Domain // Wikimedia Commons

#1. Yuma County, Arizona

#1. Yuma County, Arizona

Projected 100° days in 2050:

- Low emissions scenario: 132 days (+29 days from 2016)

- High emissions scenario: 136 days (+33 days from 2016)

Projected 90° days in 2050:

- Low emissions scenario: 194 days (+55 days from 2016)

- High emissions scenario: 197 days (+58 days from 2016)

Projected extreme heat nights (75°+) in 2050:

- Low emissions scenario: 98 nights

- High emissions scenario: 104 nights

You may also like: Dramatic satellite observations that show the true scale of Arctic change

Canva

Related to this collection

By the end of the century, summer weather could last half a year (and that's not a good thing)

By the end of the century, summer weather could last half a year (and that's not a good thing)

Sure, longer summers may sound great for a family vacation or enjoying the outdoors, but this extended season could significantly impact our health, the environment and agriculture.

Is climate change affecting our decision-making abilities?

Is climate change affecting our decision-making abilities?

A handful of recent studies conclude that a warmer world with higher CO2 concentrations in the air we breathe is likely to make us less intelligent. Here's why.

7 single-use household items you can reuse

7 single-use household items you can reuse

These tips from homeowners and gardeners will help you find small things that can be reused in many ways around your home, garden and beyond.

Arbor Day should be about growing trees, not just planting them

Arbor Day should be about growing trees, not just planting them

Planting trees is a popular way to do something for nature, but putting seedlings in the ground is just the first step. And without long-term care, those sprouts may not last.

Earth Talk: Do plants cause air pollution?

Earth Talk: Do plants cause air pollution?

Researchers recently unveiled the results of a study in which they determined that certain trees and plants common in Southern California off-gas natural yet nevertheless harmful volatile organic compounds (VOCs).

Earth Talk: What are the environmental pros and cons of GPS apps?

Earth Talk: What are the environmental pros and cons of GPS apps?

It’s hard to measure whether having GPS apps on our smartphones is positive or negative for the planet, but some environmentalists are skeptical.

Earth Talk: How does wildfire smoke impact human health?

Earth Talk: How does wildfire smoke impact human health?

With temperatures rising around the globe due to climate change, wildfires have only expanded in size and hazard, raising widespread concerns over the impacts of smoke.

These counties are projected to have the most extreme heat days in 2050

These counties are projected to have the most extreme heat days in 2050

Not all areas are equal in terms of climate change.

Arizona Daily Star
  • Facebook
  • Twitter
  • Bluesky
  • YouTube
  • Instagram
  • Arizona Daily Star Store
  • This is Tucson
  • Saddlebag Notes
  • Tucson Festival of Books

Sites & Partners

  • E-edition
  • Classifieds
  • Events calendar
  • Careers @ Lee Enterprises
  • Careers @ Gannett
  • Online Features
  • Sponsored Blogs
  • Get Healthy

Services

  • Advertise with us
  • Register
  • Contact us
  • RSS feeds
  • Newsletters
  • Photo reprints
  • Subscriber services
  • Subscription FAQ
  • Licensing
  • Shopping
© Copyright 2026 Arizona Daily Star, PO Box 26887 Tucson, AZ 85726-6887
Terms of Use | Privacy Policy | Advertising Terms of Use | Do Not Sell My Info | Cookie Preferences
Powered by BLOX Content Management System from bloxdigital.com.
  • Notifications
  • Settings
You don't have any notifications.

Get up-to-the-minute news sent straight to your device.

Topics

News Alerts

Breaking News