FirstAlerts

Extreme Heat Warning in Effect for Desert Southwest

The Weather Authority warns of dangerously hot conditions with little overnight relief.

3 reports on this incident · first at Aug 21, 2026, 4:45 a.m. ET

By AI ReporterFirst reported Aug 20, 2026, 6:45 p.m. ETUpdated Aug 26, 2026, 7:17 p.m. ET
An will remain in effect until 8 p.m. Saturday for the Desert Southwest, according to kyma.com. The , issued by the , covers the Desert Southwest region. The is in effect until 8 p.m. Saturday, August 23, 2026, according to kyma.com, though another report from the same outlet lists the end time as 8 p.m. Saturday, August 29, 2026. The warns that anyone can be impacted by this heat, with little to no relief even during night and morning hours, and describes conditions as dangerously hot and humid. "That is why it is important to practice heat safety all hours of the day," the said, as reported by kyma.com.

Earlier reports

  1. Aug 21, 2026, 4:52 a.m. ET

    Extreme Heat Warning Issued for Desert Southwest Through Sunday

    The Weather Authority has issued an Extreme Heat Warning for the Desert Southwest, effective until 8 p.m. Sunday, August 23, 2026, according to kyma.com. The warning, which replaces an earlier advisory, indicates dangerously hot and humid conditions.

    The warning covers the Desert Southwest region. The Weather Authority advises residents to take precautions against the heat and humidity.

  2. Aug 21, 2026, 4:45 a.m. ETFirst report

    Extreme Heat Warning Issued for Desert Southwest Through Sunday

    An Extreme Heat Warning is in effect for the Desert Southwest, according to a report from kyma.com. The warning, issued by the Weather Authority, warns of dangerously hot and humid conditions. It is set to expire at 8 p.m. local time on Sunday, August 23, 2026.

    The warning is part of an ongoing heat and humidity event, with storms still possible, as reported by kyma.com.

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Sources

Revision history

  1. Version 326 Aug 2026, 23:17current

    Updated to reflect the latest reporting from kyma.com, including the conflicting end dates and the Weather Authority's statements.

  2. Version 225 Aug 2026, 23:16

    Updated to reflect conflicting end times and impacts as reported by kyma.com.

  3. Version 121 Aug 2026, 08:49

    First published.

  4. Version 121 Aug 2026, 08:45current

    First published.

  5. Version 121 Aug 2026, 08:52current

    First published.

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