277
WWCA72 TJSJ 280751
NPWSJU

URGENT - WEATHER MESSAGE
National Weather Service San Juan PR
351 AM AST Thu Aug 28 2025

PRZ001>005-007-008-010-011-282100-
/O.NEW.TJSJ.XH.W.0006.250828T1400Z-250828T2100Z/
San Juan and Vicinity-Northeast-Southeast-Eastern Interior-North
Central-Ponce and Vicinity-Northwest-Mayaguez and Vicinity-
Southwest-
Including the cities of Penuelas, San German, Rincon, Florida,
Guaynabo, Gurabo, Comerio, Hatillo, Barceloneta, Arecibo, Cabo
Rojo, Loiza, Aguadilla, Salinas, Vega Alta, Aguada, Toa Baja,
Moca, Trujillo Alto, Santa Isabel, Yabucoa, Juana Diaz, Guanica,
Maunabo, Hormigueros, Caguas, Naguabo, Patillas, San Juan, San
Lorenzo, Camuy, Isabela, Carolina, Ponce, Humacao, Quebradillas,
Catano, Ceiba, Toa Alta, Cidra, Dorado, Anasco, Lajas, Las
Piedras, Guayama, Bayamon, Guayanilla, Juncos, Mayaguez, Vega
Baja, Aguas Buenas, Cayey, Manati, Canovanas, Luquillo, Yauco,
Fajardo, Arroyo, and Rio Grande
351 AM AST Thu Aug 28 2025

...EXTREME HEAT WARNING IN EFFECT FROM 10 AM THIS MORNING TO 5 PM
AST THIS AFTERNOON...

* WHAT...This level of heat affects anyone without effective cooling
  and/or adequate hydration. Impacts likely in some health systems,
  heat-sensitive industries and infrastructure.

* WHERE...Eastern Interior, Mayaguez and Vicinity, North Central,
  Northeast, Northwest, Ponce and Vicinity, San Juan and Vicinity,
  Southeast, and Southwest Counties.

* WHEN...From 10 AM this morning to 5 PM AST this afternoon.

* IMPACTS...Heat related illnesses increase significantly during
  extreme heat and high humidity events.

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.

&&

$$

PRZ012-013-VIZ001-002-282100-
/O.NEW.TJSJ.HT.Y.0048.250828T1400Z-250828T2100Z/
Culebra-Vieques-St.Thomas...St. John...and Adjacent Islands-St
Croix-
Including the cities of Vieques, Frederiksted Southeast, Cruz
Bay, Christiansted, Grove Place, Culebra, Frederiksted, Anna`s
Retreat, Charlotte Amalie, Charlotte Amalie East, and Charlotte
Amalie West
351 AM AST Thu Aug 28 2025

...HEAT ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 5 PM AST THIS
AFTERNOON...

* WHAT...This level of heat affect most individuals sensitive to
  heat, especially those without effective cooling and/or adequate
  hydration. Impacts possible in some health system and in
  heat-sensitive industries.

* WHERE...In Puerto Rico, Culebra and Vieques Counties. In Virgin
  Islands, St Croix and St. Thomas, St. John, and Adjacent Islands
  Counties.

* WHEN...From 10 AM this morning to 5 PM AST this afternoon.

* IMPACTS...Hot temperatures and high humidity may cause heat
  illnesses.

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.

&&

$$

MMC