Heat envelops our lives in Arizona's Sonoran Desert. How does it define us? Average July temperatures in the 1920s were between 89.3 and 92.7 degrees in Phoenix's urban environments, data from the ...

"Bottles for Bill" was started in memory of Bill Grimmer who died from heat exposure in 2013. Micaela Marshall reports from Phoenix.

Arizona heat is here. It is only going to get hotter this summer. Our hot weather also helps ozone pollution to worsen.

As a newcomer to the Arizona heat, Meghan Beadnell hopes sharing her story on being unprepared on a hike will prompt others to take more precautions.

Phoenix, where daytime temperatures have climbed as high as 119 degrees this summer, has set a new heat record for temps at night. This summer the city's had more nights than ever where the low ...

PHOENIX (AZFamily ... This marks 17 days in a row with record-breaking heat. This also marks the 138th day of highs at or above 100 degrees, well past the average of 111 days.

Maricopa County, where Phoenix is located, reports that it has seen 96 heat-related deaths this year as of the week ending Aug. 10. The heat directly caused 57 of those deaths and over 460 ...

Temperatures are 5 to 6 degrees hotter in Phoenix now than the already-scorching norm, and heat deaths in Maricopa County have more than quadrupled in the last seven years, leaping from 154 in ...

Yet, every year, people seem surprised Phoenix gets hot in the summer. Bloomberg News claims the Valley of the Sun faces “a Hurricane Katrina of heat.” Need a break? Play the USA TODAY Daily ...