062 WWCA72 TJSJ 070639 NPWSJU URGENT - WEATHER MESSAGE National Weather Service San Juan PR 239 AM AST Mon Sep 7 2026 PRZ001>011-072100- /O.NEW.TJSJ.XH.W.0006.260907T1400Z-260907T2100Z/ San Juan and Vicinity-Northeast-Southeast-Eastern Interior-North Central-Central Interior-Ponce and Vicinity-Northwest-Western Interior-Mayaguez and Vicinity-Southwest- Including the cities of Comerio, Maricao, Hatillo, Catano, Bayamon, Ceiba, Las Marias, Cidra, Barceloneta, Lares, Rio Grande, Salinas, Morovis, Naranjito, Caguas, Maunabo, Toa Baja, Coamo, Luquillo, Humacao, Villalba, Cayey, Guaynabo, Santa Isabel, Mayaguez, San German, Las Piedras, Carolina, San Lorenzo, Hormigueros, Moca, Utuado, Anasco, Penuelas, Guayanilla, Aguada, Orocovis, Cabo Rojo, Patillas, Ciales, Camuy, Guanica, Aibonito, Loiza, Rincon, Yauco, San Sebastian, Lajas, Aguas Buenas, Trujillo Alto, Canovanas, Corozal, Ponce, Naguabo, Juana Diaz, Florida, Sabana Grande, Vega Baja, Aguadilla, Toa Alta, Adjuntas, Juncos, Arroyo, Gurabo, Arecibo, Dorado, Quebradillas, San Juan, Barranquitas, Jayuya, Isabela, Fajardo, Vega Alta, Guayama, Manati, and Yabucoa 239 AM AST Mon Sep 7 2026 ...EXTREME HEAT WARNING IN EFFECT FROM 10 AM THIS MORNING TO 5 PM AST THIS AFTERNOON... * WHAT...This level of heat can affect anyone without effective cooling and/or adequate hydration. * WHERE...Portions of Puerto Rico, particularly across coastal and urban areas and lower-elevation valleys. * WHEN...From 10 AM this morning to 5 PM AST this afternoon. * IMPACTS...Heat-related illnesses increase significantly during periods of very high heat indices or high temperatures. This extreme heat event poses a severe threat to anyone with inadequate cooling or hydration. These extreme impacts will be most pronounced across coastal sections, lowlands, interior valleys, and urban areas. * ADDITIONAL DETAILS...Although passing showers, t-storms and clouds can provide some relief, enough sunshine and moisture is expected for heat indices to reach dangerous levels. 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. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. 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. Monitor the latest forecasts and warnings for updates. && $$ PRZ012-013-VIZ001-002-072100- /O.NEW.TJSJ.HT.Y.0054.260907T1400Z-260907T2100Z/ Culebra-Vieques-St.Thomas...St. John...and Adjacent Islands-St Croix- Including the cities of Charlotte Amalie East, Vieques, Grove Place, Frederiksted Southeast, Charlotte Amalie, Frederiksted, Culebra, Charlotte Amalie West, Christiansted, Anna's Retreat, and Cruz Bay 239 AM AST Mon Sep 7 2026 ...HEAT ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 5 PM AST THIS AFTERNOON... * WHAT...This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. * WHERE...In Puerto Rico, Culebra and Vieques. In the U.S. Virgin Islands, St Croix and St. Thomas, St. John, and Adjacent Islands. * WHEN...From 10 AM this morning to 5 PM AST this afternoon. * IMPACTS...High temperatures or elevated heat indices can worsen symptoms in people with chronic conditions. They can also increase the risk of heat-related illness among individuals sensitive to heat with inadequate cooling or hydration. These risks are highest across coastal areas, lowlands, interior valleys, and urban zones. * ADDITIONAL DETAILS...Although passing showers, t-storms and clouds can provide some relief, enough sunshine and moisture is expected for heat indices to reach dangerous levels. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ MRR