Certain Phoenix hiking trails will close starting Mother's Day for a few days with temperatures over 100 degrees. Here's where.

An extreme heat warning is in place for the Valley through May 12 with highs well above normal. But will we hit 110 degrees?

Ozone alerts prompt reduced driving across Colorado, Texas and Arizona as pollution rises and threatens respiratory health.

Our First Alert Weather Days continue through Tuesday as temperatures continue to trend well above average for this time of ...

If you’re planning to get outside on Sunday—whether it’s a workout, yard work, or a long drive—think twice. The National ...

A dry, warm winter and very low snowpack are raising wildfire concerns across Flagstaff and Northern Arizona as hotter ...

The Valley reached triple-digit temperatures Saturday, triggering an extreme heat warning that begins Sunday for Mother’s Day. Cooling centers and pods across the Valley are now open through September ...

Phoenix reached a warm 97°F on Sunday despite cloud cover and breezy conditions, with Monday expected to remain mostly sunny with a high near 95°F. Afternoon showers and thunderstorms are forecast for ...

As temperatures climb, Arizona State Parks and Trails is reminding hikers to stay hydrated, hike early in the morning, wear ...

Phoenix is already flirting with record heat, and people are asking what it means for summer.