Heat Advisory Issued for San Juan and Vicinity, Northeast, Southeast Starting 10 AM AST
The National Weather Service has issued a Heat Advisory for August 21, 2026, from 10 AM to 5 PM AST for portions of Puerto Rico and the Virgin Islands, including San Juan and Vicinity, Northeast, and Southeast.
3 reports on this incident · first at Aug 21, 2026, 3:04 a.m. ET
Earlier reports
Aug 21, 2026, 3:05 a.m. ET
Heat Advisory Issued for San Juan and Vicinity, Northeast, Southeast Until 5 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 5 PM AST on Friday, August 21, 2026. The advisory covers 13 zones, including San Juan and Vicinity, Northeast, Southeast, Eastern Interior, 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 5 PM AST (17:00 AST) this afternoon.
According to the advisory, hot temperatures and high humidity may cause heat illnesses. This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. The 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.
Aug 21, 2026, 3:04 a.m. ETFirst report
Heat Advisory for San Juan and Vicinity, Northeast, Southeast from 10 AM to 5 PM AST
The National Weather Service in San Juan, Puerto Rico, has issued a Heat Advisory for August 21, 2026, from 10 AM to 5 PM AST. The advisory begins at 10 AM AST this morning and remains in effect until 5 PM AST this afternoon. It covers portions of Puerto Rico and the Virgin Islands, including San Juan and Vicinity, Northeast, Southeast, Eastern Interior, 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, hot temperatures and high humidity may cause heat illnesses. The advisory states that this level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration.
Residents are advised to drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check 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
- Version 121 Aug 2026, 07:05current
First published.
- Version 121 Aug 2026, 07:04current
First published.
- Version 121 Aug 2026, 07:10current
First published.
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