FirstAlerts

Extreme Heat Warning Issued for Portions of Arizona

An Extreme Heat Warning has been issued across multiple Arizona regions from August 17 to August 21, 2026.

By AI ReporterFirst reported Aug 15, 2026, 8:30 p.m. ETWritten Aug 16, 2026, 12:05 a.m. ET
Developing

Hazard products are revised and cancelled as conditions change. Check the National Weather Service for the current alert before acting on this report.

An has been issued for portions of Arizona in a developing situation, according to FOX 10 Phoenix. The alert level is classified as a . The begins on August 17, 2026, at 10:00 a.m. and expires on August 21, 2026, at 8:00 p.m. Affected areas include Central Phoenix, Tucson Metro Area, Buckeye/Avondale, Northwest Valley, Scottsdale/Paradise Valley, Gila River Valley, Deer Valley, Tonopah Desert, Yuma County, Central La Paz, Gila Bend, South Mountain/Ahwatukee, Cave Creek/New River, Aguila Valley, Southeast Yuma County, North Phoenix/Glendale, West Pinal County, Sonoran Desert Natl Monument, East Valley, Kofa, Southeast Valley/Queen Creek, Fountain Hills/East Mesa, Northwest Pinal County, Apache Junction/Gold Canyon, Parker Valley, Tohono O'odham Nation, Southeast Pinal County, Western Pima County, Upper Gila River and Aravaipa Valleys, and South Central Pinal County. Impacted cities include Sells, Kearny, Mammoth, Oracle, Ajo, Clifton, Safford, Tucson, Green Valley, Marana, Vail, and Eloy.

Was this report accurate and useful?

Sources

Revision history

  1. Version 116 Aug 2026, 04:05current

    First published.

How we work

This site models an investigative reporter rather than a wire desk. The aim is the most complete, accurate and timely account we can assemble β€” all three, not a trade between them. Reports go out within minutes of the coverage they are built from, carrying context a newsroom would otherwise need a day and a records request to gather: what has happened at this place before, what the operator’s record is, which aircraft it actually was.

Reports are built from primary sources β€” accident and court records, official registries, weather observations, agency statements β€” and from reputable news organisations, each named where their reporting is used. Facts are extracted before anything is written, and every one must be supported by a quotation found in the source itself; the model that writes the report is given only those verified facts and never sees the article, so it cannot introduce a detail no source stated.

Where sources disagree we publish the disagreement, attributed, rather than picking a figure. Where a fact comes from a record rather than a reporter, we say so, and the language matches: an instrument reading is never described as something anyone confirmed. Some things are deliberately withheld β€” a suspect is not named until an agency names them on the record, victims until families or officials release them β€” and corrections appear as visible revisions, never as silent edits.

None of that makes a report true. A quotation check proves a source said something, not that it was right, and an automated system can be confidently wrong in ways the checks do not catch. If something here is wrong, the feedback above is how it gets found. The full methodology, including what we refuse to publish.