On a day that might normally have been marked by families running around Reid Park celebrating Father’s Day, many Tucsonans instead chose to stay cool indoors.

Very few park ramadas were full and the parking lots were nearly vacant by early afternoon Sunday.

With the National Weather Service issuing an excessive-heat warning until Thursday, June 22, Tucson temperatures are expected to climb Monday toward the 114-degree mark and increase to 115 degrees Tuesday and Wednesday.

Sunday’s official high was 109 degrees, according to the weather service.

It is expected to be sunny and hot Monday, with winds blowing 5 mph to 9 mph and cooling off to 81 degrees at night.

It should be more of the same on Tuesday, with light winds along with the possibility of partly cloudy skies and a low of 82 degrees.

But not everyone is avoiding the heat in the western United States, according to The Associated Press.

Some hardy souls are flocking to Death Valley, California, to experience some real heat in our country’s hottest, driest and lowest national park.

Death Valley was expecting to reach its first 120-degree day of the year on Sunday, creeping toward 124 by Tuesday as temperatures continue climbing throughout the West.

Business heats up at the park as temperatures rise.

Tourists from a host of European nations flood into the region to experience temperatures that are unheard of in their countries.

Much closer to home, officials warn that hiking and exercising after 10 a.m. is not recommended.

Also heed the usual precautions, such as drinking plenty of water; wearing light, loose clothing and a wide-brimmed hat; and being aware of common signs of dehydration and heat exhaustion.

Some symptoms include thirst; aches; muscle cramping; lightheadedness; nausea and vomiting; excessive perspiration; and cool, moist, pale or red skin.

Contact A.E. Araiza at aaraiza@tucson.com