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Extreme Heat Warning issued March 17 at 12:44AM MST until March 22 at 8:00PM MST by NWS Tucson AZ

NWS Active Alerts report on Extreme Heat Warning issued March 17 at 12:44AM MST until March 22 at 8:00PM MST by NWS Tucson AZ.

Broad coverage Major update Updated Mar 17, 2026, 7:44 AM UTC

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What changed

Fresh follow-up from NWS Active Alerts; the story now has 14 reports.

First seen Mar 16, 2026, 5:43 PM UTC Latest source Mar 17, 2026, 7:44 AM UTC

Update 1 2h ago

Extreme Heat Warning issued March 17 at 12:44AM MST until March 22 at 8:00PM MST by NWS Tucson AZ

NWS Active Alerts •published Mar 17, 2026, 7:44 AM UTC •fetched Mar 17, 2026, 7:45 AM UTC

Update 2 2h ago

Extreme Heat Warning issued March 17 at 12:17AM MST until March 22 at 8:00PM MST by NWS Phoenix AZ

NWS Active Alerts •published Mar 17, 2026, 7:17 AM UTC •fetched Mar 17, 2026, 7:20 AM UTC

Update 3 14h ago

Extreme Heat Warning issued March 16 at 12:56PM MST until March 22 at 8:00PM MST by NWS Flagstaff AZ

NWS Active Alerts •published Mar 16, 2026, 7:56 PM UTC •fetched Mar 16, 2026, 8:00 PM UTC

Update 4 15h ago

Extreme Heat Warning issued March 16 at 11:54AM MST until March 22 at 8:00PM MST by NWS Phoenix AZ

NWS Active Alerts •published Mar 16, 2026, 6:54 PM UTC •fetched Mar 16, 2026, 6:55 PM UTC

Update 5 16h ago

Extreme Heat Warning issued March 16 at 10:43AM MST until March 22 at 8:00PM MST by NWS Tucson AZ

NWS Active Alerts •published Mar 16, 2026, 5:43 PM UTC •fetched Mar 16, 2026, 5:45 PM UTC