Arizona Extreme Heat

Explore top AZ risks:

Climate Central’s analysis shows how much hotter parks are projected to get later this century.

Arizona faces a dramatic rise in extreme heat and humidity.

More than 200,000 people living in Arizona are especially vulnerable to extreme heat.

Phoenix is the 2nd fastest-warming city in the U.S.

Arizona is currently the fourth-fastest warming state in the country based on warming rates since 1970.

While the warming of the normals can look subtle, it also means a substantial increase in the incidents of extreme heat and a decrease in the frequency of extreme cold.

Summers are getting muggier as the dewpoint temperature rises

Arizona already averages more than 50 dangerous heat days a year, the second highest in the nation. By 2050, Arizona is projected to see almost 80 such days a year.

What's Happening with Extreme Heat?


Southwest, Central Plains Face ‘Unprecedented’ Drought

Climate change is creating an “unprecedented” risk of severe drought in the Southwest and Central Plains... More


The Southwest May Have Entered a ‘Drier Climate State’

The Southwest is already the most arid part of the U.S. Now new research indicates it’s becoming even more dry as wet weather patterns, quite literally, dry up... More


Climate Change Worsening Colorado River Droughts

Even as the number of Americans relying on the Colorado River for household water swells to about 40 million, global warming appears to be taking a chunk out of the flows that feed their reservoirs... More


What a Warmer Future Means for Southeastern Wildfires

Tinder-dry conditions that have resulted from months with little to no rain and toasty fall temperatures have allowed the fires to reach unusual heights. More

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