The high temperatures northwest of Phoenix are complicating efforts to fight the 8,400-acre Yarnell Hill wildfire. That's where 19 members of an elite firefighting squad died Sunday when a wind shift and other factors caused the fire to become erratic, said Mike Reichling, Arizona State Forestry Division spokesman.
The heat wave comes just a couple weeks before the 100th anniversary of what the National Weather Service calls the "highest reliably recorded air temperature on Earth" -- 134 degrees on July 10, 1913, in Death Valley's Greenland Ranch.
The valley is consistently deemed the hottest location in the world because of its depth and shape. It has one of the world's lowest elevations and also serves as one of the driest locations in North America. Its 11,000-foot surrounding mountain range traps and radiates heat down into it.
"The No. 1 thing is to absolutely know your limitations and to stay hydrated by drinking plenty of water," Chris Stachelski, a meteorologist with the National Weather Service in Las Vegas, advised those trying to cope with the high temperatures.
He recommended limiting time outdoors. For those who have to do any strenuous activity outside, he advises doing it in the early morning, evening or simply putting it off until the end of the week when the temperatures are lower.
Heat stroke symptoms include hallucinations, chills, confusion and dizziness, along with slurred speech.
To protect against heat stress, the CDC advises spending time in air-conditioned places, staying informed of heat warnings and drinking lots of fluids.
Don't forget the pets
The same advice goes for dogs, who can quickly develop heat stroke.
"Most of the time people didn't realize, it certainly was not intentional, and they bring them in very quickly when they realize that there is a problem," Brandi Garcia, a critical care specialist at Emergency Animal Clinic in Gilbert, Arizona, told CNN affiliate KNXV.
Just like with their human friends, dogs do best with plenty of water and limited exposure to the high temperatures. Also, asphalt can burn your pet's paws.