Heat Advisory
URGENT - WEATHER MESSAGE
National Weather Service San Juan PR
350 AM AST Tue Sep 30 2025
PRZ001>005-007-008-010>013-VIZ001-002-301600-
/O.NEW.TJSJ.HT.Y.0073.250930T1400Z-250930T2100Z/
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 Charlotte Amalie East, Dorado, Vega Baja,
San German, Vieques, Hatillo, Cruz Bay, Arroyo, Yauco,
Guayanilla, Toa Baja, Ceiba, Guayama, Guaynabo, Rio Grande,
Juncos, Ponce, San Juan, Aguada, Mayaguez, Cabo Rojo, Anna`s
Retreat, Humacao, Quebradillas, Rincon, Moca, Lajas, Penuelas,
Aguadilla, Culebra, Canovanas, Luquillo, Santa Isabel, San
Lorenzo, Charlotte Amalie West, Cayey, Manati, Christiansted,
Naguabo, Florida, Anasco, Arecibo, Comerio, Frederiksted, Las
Piedras, Salinas, Gurabo, Fajardo, Toa Alta, Cidra, Vega Alta,
Charlotte Amalie, Barceloneta, Patillas, Bayamon, Camuy, Caguas,
Grove Place, Trujillo Alto, Maunabo, Hormigueros, Carolina,
Catano, Isabela, Aguas Buenas, Frederiksted Southeast, Loiza,
Yabucoa, Guanica, and Juana Diaz
350 AM AST Tue Sep 30 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...Portions of Puerto Rico and Virgin Islands.
* WHEN...All urban and coastal areas, as well as the eastern
interior of Puerto Rico, Vieques, Culebra, and U.S. Virgin Islands.
* 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.
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.
&&
$$
MNG
Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service San Juan PR
430 AM AST Tue Sep 30 2025
AMZ711>745-PRZ001>013-010830-
San Juan and Vicinity-Northeast-Southeast-Eastern Interior-
North Central-Central Interior-Ponce and Vicinity-Northwest-
Western Interior-Mayaguez and Vicinity-Southwest-Culebra-Vieques-
The nearshore and off shore Atlantic and Caribbean Coastal Waters-
430 AM AST Tue Sep 30 2025
This Hazardous Weather Outlook is for portions of Puerto Rico.
.DAY ONE...Today and Tonight
.Lightning...Isolated thunderstorms, particularly across
northwestern Puerto Rico. Stay alert and be prepared to take
shelter if storms develop.
.Excessive Rainfall...Flooding in urban areas, roads, small
streams, and washes, particularly across northwestern Puerto Rico.
There is a low chance of isolated flash floods. Elsewhere, plan
for water ponding on roads and in poorly drained areas.
.Excessive Heat...This level of heat affects most individuals
sensitive to heat, especially those without effective cooling
and/or adequate hydration. Those extremely sensitive to heat face
the highest risk. Some health systems and heat-sensitive
industries could be affected. These conditions are most likely
across all coastal and urban areas, including Caguas, Culebra, and
Vieques.
.Rip Currents...Life-threatening rip currents are possible in the
surf zone, particularly across the north-facing beaches of Puerto
Rico. Isolated stronger rip currents may occur elsewhere,
especially near piers, jetties, and channels.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday
The heat risk will remain elevated through the workweek. Extreme
Heat Warning conditions are possible on Wednesday across most
urban areas of the lower elevations of the islands. Afternoon
thunderstorms could lead to urban and small stream flooding each
day along the Cordillera Central. A large, long period northerly
swell will promote hazardous seas and life-threatening rip
currents from late Thursday through Sunday.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is encouraged. Please relay any information
about flooding and rip currents to the National Weather Service
in San Juan.
$$
Hazardous Weather Outlook
National Weather Service San Juan PR
430 AM AST Tue Sep 30 2025
AMZ716-726-VIZ001-002-010830-
St. Thomas St. John adjacent Islands-St Croix-
Nearshore Atlantic and adjacent Caribbean Coastal Waters-
430 AM AST Tue Sep 30 2025
This Hazardous Weather Outlook is for portions of USVI.
.DAY ONE...Today and Tonight
.Excessive Heat...This level of heat affects most individuals
sensitive to heat, especially those without effective cooling
and/or adequate hydration. Those extremely sensitive to heat face
the highest risk. Some health systems and heat-sensitive
industries could be affected. These conditions are most likely
across all the U.S. Virgin Islands.
.Rip Currents...Life-threatening rip currents are possible in the
surf zone, particularly across north facing beaches of St. Thomas
and St. John. Isolated stronger rip currents may occur elsewhere,
especially near piers, jetties, and channels.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday
The heat risk will remain elevated through the workweek. Extreme
Heat Warning conditions are possible on Wednesday across most
urban areas of the lower elevations of the islands. A large, long
period northerly swell will promote hazardous seas and life-
threatening rip currents from late Thursday through Sunday.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is encouraged. Please relay any information
about flooding and rip currents to the National Weather Service
in San Juan.
$$
