NWS Warns Heat and Humidity May Cause Heat Illnesses Across Puerto Rico and Virgin Islands
The National Weather Service updated its advisory to highlight heat illness risks across 13 zones on August 20, 2026.
2 reports on this incident · first at Aug 20, 2026, 1:44 a.m. ET
Earlier reports
Aug 20, 2026, 1:44 a.m. ETFirst report
NWS Issues Heat Advisory for Portions of Puerto Rico and Virgin Islands
Official records from the National Weather Service San Juan PR show that a Heat Advisory has been issued for August 20, 2026. The advisory window begins at 10:00 AM AST this morning and expires at 5:00 PM AST this afternoon.
According to official records, the advisory spans 13 zones across 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. Affected municipalities and cities include Florida, Canovanas, Hormigueros, Arroyo, Grove Place, Charlotte Amalie, Naguabo, Moca, Toa Alta, Barceloneta, Ponce, Loiza, Cidra, Quebradillas, Aguada, Dorado, Catano, Juana Diaz, Salinas, Aguas Buenas, Culebra, Charlotte Amalie East, Patillas, Isabela, and Cruz Bay.
National Weather Service San Juan PR records state that hot temperatures and high humidity may cause heat illnesses, affecting individuals sensitive to heat, especially those without effective cooling or adequate hydration. The record recommends drinking plenty of fluids, staying in air-conditioned rooms, staying out of the sun, and checking up on relatives and neighbors.
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- Version 120 Aug 2026, 22:54current
First published.
- Version 120 Aug 2026, 05:44current
First published.
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