Heat Advisory Takes Effect at 10 A.M. Monday for Puerto Rico and the Virgin Islands
The National Weather Service San Juan PR advisory begins at 10 a.m. AST on Aug. 17, 2026, and expires at 5 p.m. AST the same afternoon, warning that hot temperatures and high humidity may cause heat illnesses.
2 reports on this incident · first at Aug 17, 2026, 1:25 a.m. ET
Hazard products are revised and cancelled as conditions change. Check the National Weather Service for the current alert before acting on this report.
Earlier reports
Aug 17, 2026, 1:25 a.m. ETFirst report
National Weather Service Issues Heat Advisory for Puerto Rico and Virgin Islands
A Heat Advisory is in effect on August 17, 2026, for portions of Puerto Rico and the Virgin Islands in a developing situation, according to official records from the National Weather Service San Juan PR. The advisory is scheduled from 10 AM to 5 PM AST.
The advisory spans 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. Specific cities listed include Patillas, Moca, Rio Grande, Charlotte Amalie, Humacao, Aguadilla, Isabela, Ponce, Frederiksted, Anna's Retreat, Vega Baja, Aguada, Lajas, Yauco, Grove Place, Cidra, Toa Baja, San German, Canovanas, Salinas, Quebradillas, Catano, Vega Alta, Ceiba, and Barceloneta.
Official records state that hot temperatures and high humidity may cause heat illnesses, affecting individuals sensitive to heat, particularly those without effective cooling or adequate hydration. Recommended precautions include drinking plenty of fluids, remaining in air-conditioned rooms, staying out of the sun, and checking on relatives and neighbors. For outdoor work, the Occupational Safety and Health Administration recommends frequent rest breaks in shaded or air-conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Official records emphasize that heat stroke is an emergency and to call 9 1 1.
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Revision history
- Version 117 Aug 2026, 05:42current
First published.
- Version 117 Aug 2026, 05:25current
First published.
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