Alert · Weather · U.S. Virgin Islands

Weather Alert: Heat Advisory

USVI weather update: Heat Advisory issued September 12 at 10:35AM AST until September 12 at 5:00PM AST by NWS San Juan PR.

Alert
Moderate

Issued by NWS San Juan PR

Heat Advisory issued September 12 at 10:35AM AST until September 12 at 5:00PM AST by NWS San Juan PR

Issued by
NWS San Juan PR
Affected areas
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
Severity
Moderate
Urgency
Expected
Certainty
Likely
Recommended response
Execute
Issued
Sep 12, 2026, 10:35 AM AST
Begins
Sep 12, 2026, 10:35 AM AST
Ends
Sep 12, 2026, 5:00 PM AST

Official details

What

This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration.

Where

Puerto Rico and US 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.

Safety instructions

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.

Monitor the latest forecasts and warnings for updates.

Illustrated USVI News weather alert graphic for the U.S. Virgin Islands.