# HEADLINE
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HEAT ADVISORY IN EFFECT UNTIL 5 PM AST THIS AFTERNOON
# SUMMARY
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San Juan and Vicinity-Northeast-Southeast-Eastern Interior-North Central-Ponce and Vicinity-Northwest-Mayaguez and Vicinity- Southwest-Culebra-Vieques-St.Thomas...St. John...and Adjacent Islands-St Croix- Including the cities of San Juan, Santa Isabel, Charlotte Amalie West, Mayaguez, Arecibo, Vega Baja, Canovanas, Culebra, Dorado, Las Piedras, Fajardo, Aguada, Ceiba, Naguabo, Moca, Lajas, Catano, Anasco, Rincon, Quebradillas, Grove Place, Guaynabo, Juana Diaz, Rio Grande, Caguas, Maunabo, Salinas, Vega Alta, Humacao, Cayey, Charlotte Amalie East, Yauco, Guayama, Christiansted, Loiza, Camuy, Frederiksted, Aguas Buenas, Juncos, Isabela, Hormigueros, Toa Alta, Manati, Frederiksted Southeast, Bayamon, Anna's Retreat, Trujillo Alto, Cabo Rojo, Guanica, Cruz Bay, Patillas, Gurabo, Guayanilla, Charlotte Amalie, Carolina, Vieques, Comerio, Luquillo, Yabucoa, Florida, Hatillo, Penuelas, Arroyo, Barceloneta, Aguadilla, San Lorenzo, Cidra, Toa Baja, Ponce, and San German 828 AM AST Thu Jul 23 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. expected.
WHERE
Portions of Puerto Rico and Virgin Islands.
WHEN
Until 5 PM AST this afternoon.
IMPACTS
Hot temperatures and high humidity may cause heat illnesses.
ISSUED AT
Thursday, July 23, 2026 at 8:28 AM 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.