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Two hikers, a man and a woman, traveling with different hiking groups on separate trails north of Tucson died Sunday, as temperatures soared to 115 degrees in the city, its third-hottest day on record.

More heat-related deaths, including a 28-year-old woman who died while mountain biking, were reported in the Phoenix area this weekend where temperatures topped out at 118 degrees. 

Despite the intense Arizona heat, hikers could still be found on trails along the Catalina Mountains.

The female hiker, believed to be in her early twenties and from out of state, was hiking the Finger Rock Trail with a male partner when they lost their way, according to Deputy Courtney Rodriguez, a Pima County Sheriff’s spokesperson

A call for help was placed around 11:30 a.m., Rodriguez said.

Search and rescue deputies from the sheriff's department and Southern Arizona Rescue Association attempted to retrieve the two by helicopter, but the woman died before they reached the scene.

The male hiker was transported to Banner-University Medical Center, where he is being treated for his injuries. 

Another hiker, believed to be European, died Sunday afternoon while exploring a trail in Ventana Canyon with two friends, one of whom is still missing, Rodriguez said.

Three search and rescue operations were conducted in total in the Tucson area, including one near Seven Falls in Sabino Canyon. 

Tucson's 115-degree high surpasses the previous record for the date of 112 degrees set in 1989. It's also a few degrees shy of Tucson's hottest temperature ever recorded of 117 degrees set on June 26, 1990.

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Phoenix also hit a new record for the day, reaching 118 degrees and surpassing the previous record of 115 degrees set in 1960. 

Other areas that experienced record-breaking heat for the day included the Bisbee-Douglas International Airport with 109 degrees, Organ Pipe Cactus National Monument with 119 degrees, Nogales with 109 degrees and Safford with 112 degrees.

An excessive heat warning has been in effect for most of southern and central Arizona since Saturday. It will remain in effect until tonight at 8p.m.

People are encouraged to drink plenty of water, dress for the heat and limit your time outdoors.