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Puerto Rico weather alerts

1 National Weather Service alert is in force in Puerto Rico: a heat advisory.

Checked Sun, Sep 20, 2026, 2:17 PM AST. Times are Atlantic Standard Time.

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Alerts in force1

Every product covering any part of Puerto Rico, worst first, with its full text.

Moderate 1

Heat Advisory

Moderate

Heat Advisory issued September 20 at 10:16AM AST until September 20 at 3:00PM AST by NWS San Juan PR

Issued Until 43 min left

Areas San Juan and Vicinity, PR; Northeast, PR; Southeast, PR; Eastern Interior, PR; North Central, PR; Central Interior, PR; Ponce and Vicinity, PR; Northwest, PR; Western Interior, PR; Mayaguez and Vicinity, PR; Southwest, PR; Culebra, PR; Vieques, PR; St.Thomas...St. John.. and Adjacent Islands, VI; St Croix, VI

Full text

* WHAT...This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. * WHERE...Puerto Rico and the US Virgin Islands. * WHEN...Until 3 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.

What to do

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.

NWS San Juan PRShare this alert

What this means

Warning
The hazard is happening or about to. Act now: a tornado warning means take shelter, a flash flood warning means move to higher ground.
Watch
Conditions favor the hazard. Nothing is happening yet; have a plan and be ready to act if a warning follows.
Advisory
A hazard that is less serious than a warning but can still cause trouble, such as dense fog, heat or light ice.
Statement
Information about weather that does not yet meet a warning: a strong storm, a hydrologic update, or a special weather statement.

Severity (extreme, severe, moderate, minor) is the rating the issuing office gives each product. More on the difference: tornado watch vs. tornado warning. Alerts come from the National Weather Service; follow its instructions and your local officials.

Sources

Alerts from the National Weather Service's public feed, read afresh every minute, and matched to counties and zones by their UGC codes. Warnings from outside the United States come from each country's own meteorological service. Follow the issuing office's instructions and your local officials.