# HEADLINE
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EXTREME HEAT WARNING IN EFFECT FROM 9 AM THIS MORNING TO 5 PM AST THIS AFTERNOON
# DETAILS
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WHAT
Dangerously hot conditions with This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. expected.
WHERE
Eastern Interior, Mayaguez and Vicinity, North Central, Northeast, Northwest, Ponce and Vicinity, San Juan and Vicinity, Southeast, and Southwest Counties.
WHEN
From 9 AM this morning to 5 PM AST this afternoon.
IMPACTS
Heat related illnesses increase significantly during extreme heat and high humidity events.
ISSUED AT
Wednesday, August 26, 2026 at 12:56 AM AST
ISSUED BY
National Weather Service San Juan PR
HEADER
URGENT - WEATHER MESSAGE
# PRECAUTIONARY/PREPAREDNESS ACTIONS
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Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.
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.
Stay cool, stay hydrated, stay informed.
# AREAS AFFECTED
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Southwest, Eastern Interior, Mayaguez and Vicinity, North Central, Northeast, Northwest, Ponce and Vicinity, San Juan and Vicinity, Southeast
Including the cities of Vega Alta, Yabucoa, Cabo Rojo, Vega Baja, Ponce, Juana Diaz, Patillas, Loiza, Toa Alta, Mayaguez, Carolina, Barceloneta, Guaynabo, Luquillo, Hormigueros, Salinas, Aguadilla, Arecibo, Las Piedras, Comerio, Santa Isabel, Rio Grande, San Lorenzo, Anasco, San Juan, Hatillo, Maunabo, Bayamon, Naguabo, Cidra, Guanica, Aguas Buenas, Florida, Penuelas, Manati, Rincon, Quebradillas, Fajardo, Moca, Trujillo Alto, Juncos, Gurabo, Ceiba, Canovanas, Catano, Guayama, Camuy, Cayey, Isabela, Aguada, Lajas, Toa Baja, Guayanilla, Caguas, San German, Humacao, Dorado, Yauco, and Arroyo