# HEADLINE
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HEAT ADVISORY REMAINS IN EFFECT UNTIL 5 PM AST THIS AFTERNOON
# SUMMARY
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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- Including the cities of Guaynabo, Ceiba, Frederiksted, Vega Alta, Salinas, Juncos, Anna's Retreat, Yauco, Jayuya, Coamo, Carolina, Aibonito, Toa Baja, Anasco, Cabo Rojo, Arroyo, Gurabo, Arecibo, San Sebastian, Trujillo Alto, Dorado, Loiza, Ponce, Las Marias, Maricao, Las Piedras, Maunabo, Bayamon, Grove Place, Barranquitas, San Lorenzo, Florida, Aguada, Corozal, Charlotte Amalie West, Vieques, Orocovis, Yabucoa, Rio Grande, Mayaguez, Barceloneta, Lajas, Villalba, Quebradillas, Adjuntas, Penuelas, Guanica, Cayey, Charlotte Amalie, Guayama, Frederiksted Southeast, Culebra, Cruz Bay, Juana Diaz, Canovanas, Vega Baja, Cidra, Catano, Sabana Grande, Christiansted, Patillas, Toa Alta, Charlotte Amalie East, Moca, San German, Humacao, Fajardo, Comerio, Santa Isabel, Aguadilla, Utuado, Camuy, San Juan, Naranjito, Rincon, Guayanilla, Luquillo, Manati, Morovis, Lares, Isabela, Ciales, Hatillo, Naguabo, Caguas, Hormigueros, and Aguas Buenas 1253 PM AST Sat Sep 5 2026
# DETAILS
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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 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.
ISSUED AT
Saturday, September 5, 2026 at 12:53 PM AST
ISSUED BY
National Weather Service San Juan PR
HEADER
URGENT - WEATHER MESSAGE
# PRECAUTIONARY/PREPAREDNESS ACTIONS
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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.
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.