FirstAlerts

Heat Advisory Extended Through 4 PM AST for Puerto Rico and Virgin Islands

The National Weather Service has extended the heat advisory for portions of Puerto Rico and the Virgin Islands until 4 PM AST on August 23.

4 reports on this incident · first at Aug 23, 2026, 3:40 a.m. ET

By AI ReporterWritten Aug 23, 2026, 3:52 a.m. ET
The National Weather Service in San Juan has extended a for portions of Puerto Rico and the Virgin Islands, now in effect from 10 AM to 4 PM AST on Sunday, August 23, 2026. The was originally set to expire earlier, but the end time has been pushed back, extending the period of dangerous heat. The covers zones, including San Juan and Vicinity, Northeast, Southeast, North Central, Ponce and Vicinity, Northwest, Mayaguez and Vicinity, Southwest, Culebra, Vieques, St. Thomas...St. John...and Adjacent Islands, and St Croix. Affected cities include Barceloneta, Rio Grande, Ponce, Toa Alta, Luquillo, Salinas, Yauco, Cruz Bay, Camuy, Charlotte Amalie, Arecibo, Guayanilla, Charlotte Amalie East, Patillas, Dorado, Anasco, Vega Alta, Moca, Aguada, Charlotte Amalie West, Bayamon, Frederiksted Southeast, Rincon, Canovanas, and Santa Isabel. This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. 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. 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; call 9 1 1.

Earlier reports

  1. Aug 23, 2026, 3:50 a.m. ET

    Heat Advisory Issued for San Juan and Vicinity, Northeast, Southeast Through 4 PM AST

    The National Weather Service in San Juan has issued a Heat Advisory for San Juan and Vicinity, Northeast, Southeast, and other areas in Puerto Rico and the Virgin Islands, effective from 10 AM to 4 PM AST on Sunday, August 23, 2026. The advisory expires at 4 PM AST (2026-08-23T16:00:00-04:00). It covers 12 zones, including San Juan and Vicinity, Northeast, Southeast, North Central, Ponce and Vicinity, Northwest, Mayaguez and Vicinity, Southwest, Culebra, Vieques, St. Thomas...St. John...and Adjacent Islands, and St Croix.

    According to the advisory, this level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. Hot temperatures and high humidity may cause heat illnesses. The advisory recommends drinking plenty of fluids, staying in an air-conditioned room, staying out of the sun, and checking on relatives and neighbors. 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.

  2. Aug 23, 2026, 3:44 a.m. ET

    Heat Advisory Issued for San Juan and Vicinity, Northeast, Southeast Through 4 PM AST

    The National Weather Service in San Juan has issued a Heat Advisory for portions of Puerto Rico and the Virgin Islands, effective from 10 AM to 4 PM AST on Sunday, August 23, 2026. The advisory covers 12 zones, including San Juan and Vicinity, Northeast, Southeast, North Central, Ponce and Vicinity, Northwest, Mayaguez and Vicinity, Southwest, Culebra, Vieques, St. Thomas...St. John...and Adjacent Islands, and St Croix. The advisory expires at 4 PM AST today.

    According to the advisory, this level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. Hot temperatures and high humidity may cause heat illnesses. The advisory recommends drinking plenty of fluids, staying in an air-conditioned room, staying out of the sun, and checking on relatives and neighbors. 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; call 9 1 1.

  3. Aug 23, 2026, 3:40 a.m. ETFirst report

    Heat Advisory for San Juan and Vicinity, Northeast, Southeast Until 4 PM AST

    The National Weather Service in San Juan, Puerto Rico, has issued a Heat Advisory for portions of Puerto Rico and the Virgin Islands, effective from 10 AM to 4 PM AST on Sunday, August 23, 2026. The advisory expires at 4 PM AST. The advisory covers 12 zones, including San Juan and Vicinity, Northeast, Southeast, North Central, Ponce and Vicinity, Northwest, Mayaguez and Vicinity, Southwest, Culebra, Vieques, St. Thomas... St. John... and Adjacent Islands, and St. Croix.

    The advisory warns that hot temperatures and high humidity may cause heat illnesses, affecting most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. The National Weather Service recommends drinking plenty of fluids, staying in an air-conditioned room, staying out of the sun, and checking on relatives and neighbors. 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 123 Aug 2026, 07:52current

    First published.

  2. Version 123 Aug 2026, 07:44current

    First published.

  3. Version 123 Aug 2026, 07:40current

    First published.

  4. Version 123 Aug 2026, 07:50current

    First published.

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