Puerto Rico, U.S. Virgin Islands Moderate Heat Advisory | Effective 09/25/2026 12:39

Headline: 
Heat Advisory issued September 25 at 3:39PM AST until September 25 at 5:00PM AST by NWS San Juan PR
Event: 
Heat Advisory
Urgency: 
Expected
Effective: 
September 25, 2026 - 12:39pm
Expires: 
September 25, 2026 - 2:00pm
Description: 
* WHAT...This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. * WHERE...Portions of Puerto Rico and the U.S. Virgin Islands. * WHEN...Until 5 PM AST this afternoon. * IMPACTS...High temperatures or elevated heat indices can worsen symptoms in people with chronic conditions. They can also increase the risk of heat-related illness among individuals sensitive to heat with inadequate cooling or hydration. These risks are highest across coastal areas, lowlands, interior valleys, and urban zones. * ADDITIONAL DETAILS...Although showers and thunderstorms have developed over sectors of central interior to western interior Puerto Rico, elevated heat indices along other areas, especially coastal areas, continue.
Instruction: 
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.
Area Description: 
San Juan and Vicinity; Northeast; Southeast; Eastern Interior; North Central; Central Interior; Ponce and Vicinity; Northwest; Western Interior; Mayaguez and Vicinity; Southwest; Culebra; Vieques; St.Thomas...St. John.. and Adjacent Islands; St Croix
Forcast Office: 
NWS San Juan PR
Sender: 
w-nws.webmaster@noaa.gov