Weather Alerts For San Juan, PR

# HEADLINE -------------------- HEAT ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 5 PM AST THIS AFTERNOON # SUMMARY -------------------- 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 Frederiksted Southeast, Mayaguez, Arroyo, Ceiba, Anasco, Trujillo Alto, Bayamon, Loiza, Quebradillas, Canovanas, Rincon, Vega Baja, Cidra, Lajas, Aguadilla, Rio Grande, Charlotte Amalie, Carolina, Juana Diaz, Toa Alta, Ponce, Charlotte Amalie East, Grove Place, Patillas, Yauco, Fajardo, Culebra, Hormigueros, San Juan, San German, Guanica, Charlotte Amalie West, Toa Baja, Camuy, Cabo Rojo, Manati, Penuelas, Cayey, Vieques, Luquillo, Moca, Dorado, Yabucoa, Humacao, Isabela, Anna's Retreat, Vega Alta, Maunabo, Santa Isabel, Guayama, Florida, Christiansted, Caguas, Gurabo, Juncos, Aguas Buenas, Barceloneta, Hatillo, San Lorenzo, Cruz Bay, Arecibo, Salinas, Guaynabo, Las Piedras, Catano, Guayanilla, Frederiksted, Aguada, Naguabo, and Comerio 150 AM AST Sat Aug 8 2026 # DETAILS -------------------- 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 From 10 AM this morning to 5 PM AST this afternoon. IMPACTS Hot temperatures and high humidity may cause heat illnesses. ISSUED AT Saturday, August 8, 2026 at 1:50 AM AST ISSUED BY National Weather Service San Juan PR HEADER URGENT - WEATHER MESSAGE # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.