Puerto Rico, U.S. Virgin Islands Moderate Heat Advisory | Effective 09/10/2026 23:11

Headline: 
Heat Advisory issued September 11 at 2:11AM AST until September 11 at 5:00PM AST by NWS San Juan PR
Event: 
Heat Advisory
Urgency: 
Expected
Effective: 
September 10, 2026 - 11:11pm
Expires: 
September 11, 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...In Puerto Rico, Culebra and Vieques. In U.S. Virgin Islands, St Croix and St. Thomas, St. John, and Adjacent Islands. * WHEN...From 10 AM this morning to 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...High concentrations of Saharan Dust will also be present today, resulting in hazy skies, reduced visibilities and deteriorated air quality.
Instruction: 
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during 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.
Area Description: 
Culebra; Vieques; St.Thomas...St. John.. and Adjacent Islands; St Croix
Forcast Office: 
NWS San Juan PR
Sender: 
w-nws.webmaster@noaa.gov