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Extreme Heat Warning for Columbia, Union, and Caddo Areas Until 9 PM CDT

The National Weather Service in Shreveport has issued an Extreme Heat Warning for portions of Arkansas, Louisiana, and Texas, in effect from 10 AM to 9 PM CDT on August 21, 2026.

4 reports on this incident · first at Aug 21, 2026, 1:40 a.m. ET

By AI ReporterWritten Aug 21, 2026, 1:53 a.m. ET
Developing · checked 1h ago

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

We last searched for new coverage of this at Aug 21, 2026, 1:38 a.m. ET — checked 1h ago.

The National Weather Service in Shreveport, Louisiana, has issued an for The is in effect from 10 AM to 9 PM CDT on August 21, 2026. Dangerously hot conditions with heat index values up to 114 degrees are expected across zones, including cities such as Bossier City, Shreveport, Monroe, Tyler, and Marshall. The covers counties including Columbia, Union, Caddo, Bossier, Webster, and many others. The National Weather Service advises drinking plenty of fluids, staying in an air-conditioned room, staying out of the sun, and checking on relatives and neighbors. Do not leave young children and pets in unattended vehicles, as car interiors can reach lethal temperatures in minutes. For outdoor work, OSHA recommends frequent rest breaks in shaded or air-conditioned environments. Anyone overcome by heat should be moved to a cool, shaded location; heat stroke is an emergency, and 9 1 1 should be called.

Earlier reports

  1. Aug 21, 2026, 1:49 a.m. ET

    Extreme Heat Warning for Columbia, Union, Caddo and Surrounding Areas Until 9 PM CDT

    The National Weather Service Shreveport LA has issued an Extreme Heat Warning for August 21, 2026, from 10 AM to 9 PM CDT. The warning covers portions of south central and southwest Arkansas, north central and northwest Louisiana, and east and northeast Texas, including 33 zones across the listed counties and cities. Affected areas include Columbia, Union, and Caddo counties, among others.

    Dangerously hot conditions with heat index values up to 114 degrees are expected. The warning states that heat-related illnesses increase significantly during extreme heat and high humidity events. Precautions include drinking plenty of fluids, staying in an air-conditioned room, staying out of the sun, and checking on relatives and neighbors. Do not leave young children and pets in unattended vehicles, as car interiors will reach lethal temperatures in a matter of minutes. For outdoor work, OSHA recommends frequent rest breaks in shaded or air-conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location; heat stroke is an emergency, and 9 1 1 should be called.

    The warning remains in effect until 9 PM CDT this evening.

  2. Aug 21, 2026, 1:45 a.m. ET

    National Weather Service Extends Flood Watch Through Late Monday Night for Columbia, Union, Caddo

    The National Weather Service Shreveport LA warns that heat-related illnesses increase significantly during extreme heat and high humidity events, with dangerously hot conditions and heat index values up to 114 degrees expected on Friday, August 21, 2026.

    The warning is in effect from 10 AM to 9 PM CDT, covering portions of south central and southwest Arkansas, north central and northwest Louisiana, and east and northeast Texas, including 33 zones across those areas. The warning expires at 9 PM CDT (21:00) on August 21, 2026.

    The Weather Service advises drinking plenty of fluids, staying in an air-conditioned room, staying out of the sun, and checking on relatives and neighbors. It warns not to leave young children and pets in unattended vehicles, as car interiors will reach lethal temperatures in a matter of minutes. For outdoor work, OSHA recommends frequent rest breaks in shaded or air-conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location; heat stroke is an emergency, and the public should call 9 1 1.

  3. Aug 21, 2026, 1:40 a.m. ETFirst report

    Extreme Heat Warning Issued for Columbia, Union, and Caddo Areas

    The National Weather Service in Shreveport, Louisiana, has issued an Extreme Heat Warning for August 21, 2026, from 10 AM to 9 PM CDT. The warning covers portions of south central and southwest Arkansas, north central and northwest Louisiana, and east and northeast Texas, including Columbia, Union, and Caddo counties, as well as cities such as Shreveport, Tyler, and Monroe.

    The warning states that dangerously hot conditions with heat index values up to 114 degrees are expected. Heat-related illnesses increase significantly during extreme heat and high humidity events. The National Weather Service advises drinking plenty of fluids, staying in an air-conditioned room, staying out of the sun, and checking on relatives and neighbors. They also warn against leaving young children and pets in unattended vehicles, as car interiors will reach lethal temperatures in a matter of minutes.

    For outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air-conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency; call 9 1 1.

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Revision history

  1. Version 121 Aug 2026, 05:53current

    First published.

  2. Version 121 Aug 2026, 05:45current

    First published.

  3. Version 121 Aug 2026, 05:40current

    First published.

  4. Version 121 Aug 2026, 05:49current

    First published.

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