Phoenix Faces Extreme Heat Warning as Temps Reach 109 Degrees

Officials urge caution as the National Weather Service forecasts scorching temperatures this weekend.

Mar. 17, 2026 at 11:04pm

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The National Weather Service has issued an Extreme Heat Warning for the Phoenix area, with forecasted temperatures between 103 and 109 degrees Fahrenheit from March 19-22. The City of Phoenix has announced plans to close certain trails due to the heat, and fire crews have conducted multiple rescue operations in the past 24 hours. Authorities are urging residents to take precautions, stay hydrated, and avoid outdoor activities during the heatwave.

Why it matters

Phoenix is no stranger to extreme heat, but this early-season heatwave is particularly concerning as people may not have had time to adjust to the sustained high temperatures. Heat-related illnesses can be life-threatening, and the city's emergency services are already strained by the number of rescues. Protecting vulnerable populations and ensuring public safety are critical priorities during this event.

The details

The National Weather Service has forecasted temperatures between 103 and 109 degrees Fahrenheit for the Phoenix area from March 19-22. The City of Phoenix has announced plans to close certain trails due to the heat, and fire crews have conducted six rescue operations in the past 24 hours. Authorities are urging residents to stay hydrated, seek out air-conditioned spaces, and avoid outdoor activities during the heatwave.

  • The Extreme Heat Warning is in effect from March 19-22, 2026.
  • The National Weather Service issued the warning on March 17, 2026.

The players

National Weather Service

The federal agency responsible for weather forecasting and issuing weather-related warnings and advisories.

City of Phoenix

The local government of Phoenix, Arizona, which has announced plans to close certain trails due to the extreme heat.

Phoenix Fire Department

The fire department for the city of Phoenix, which has conducted six rescue operations in the past 24 hours due to the heatwave.

Dr. Eugene Livar

The Chief Heat Officer at the Arizona Department of Health Services, who has provided guidance on staying safe during the heatwave.

American Red Cross

The nonprofit organization that has issued guidance on how to prepare for and stay safe during the extreme heat.

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What they’re saying

“'Early season heat waves deserve extra attention because people simply have not had time to adjust to sustained high temperatures. We see it every year throughout Arizona. The first major heat event can catch people off guard and lead to preventable heat illness. A few simple steps, such as staying hydrated, spending time in cool spaces, and planning outdoor work or activity carefully, can make a real difference in staying safe.'”

— Dr. Eugene Livar, Chief Heat Officer, Arizona Department of Health Services (12news.com)

“Six rescues in 24 hours isn't a coincidence. If you're planning to go on a hike soon, you need to hear this.”

— Phoenix Fire Department (Twitter)

What’s next

The City of Phoenix will continue to monitor the situation and provide updates on any trail closures or other measures taken to protect public safety during the heatwave.

The takeaway

This early-season heatwave in Phoenix serves as a stark reminder of the importance of being prepared for extreme weather events, even before the traditional peak of summer. By taking simple precautions like staying hydrated, seeking out air-conditioned spaces, and avoiding outdoor activities during the hottest parts of the day, residents can help prevent heat-related illnesses and ensure their own safety and that of their community.