Key facts
- Alert
- Flash Flood Warning (severe)
- Issued by
- National Weather Service, San Juan PR
- Areas
- Carolina, PR; Guaynabo, PR; San Juan, PR; Trujillo Alto, PR
- In effect
- until 4:15 PM AST, Oct 19, 2026
- Detection
- Radar indicated
What the National Weather Service says
“Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.”
NWS San Juan PR, Flash Flood Warning, 1:28 PM AST Oct 19, 2026 · official alert
“Flash flooding is ongoing or expected to begin shortly.”
NWS San Juan PR, Flash Flood Warning, 1:28 PM AST Oct 19, 2026 · official alert
“Be aware of your surroundings and do not drive on flooded roads.”
NWS San Juan PR, Flash Flood Warning, 1:28 PM AST Oct 19, 2026 · official alert
What to do
Do not drive on flooded roads. The National Weather Service says most flood deaths occur in vehicles. Turn around and find another route.
Move to higher ground if water is rising near you. Stay away from small creeks and streams, underpasses and low-lying areas, which the warning lists as at risk.
Just 6 inches of moving water can knock you down, and 1 foot can sweep a vehicle away. Never drive around barricades.
If you can do so safely, report flooding to local emergency services or law enforcement so they can pass it to the National Weather Service.
Context
The warning covers northern Carolina, northern Guaynabo, San Juan and Trujillo Alto. FEMA flood-insurance claims show past flood losses in three of these municipalities: 1,066 in Carolina, 247 in Guaynabo and 3,106 in San Juan. These counts only include insured properties, so they understate total flood damage.
Carolina, Guaynabo and San Juan have each had federal disaster declarations for hurricanes, including Fiona in 2022, Maria and Irma in 2017, and Irene in 2011.
Updates
- The flash flood warning is no longer in effect.
- NWS San Juan PR issued the flash flood warning until 4:15 PM AST.
History here
Carolina County: 1066 flood insurance claims in FEMA's National Flood Insurance Program records since 1979, most recent 2024.
Carolina County: recent federal disaster declarations
- DR-4671 (2022): hurricane fiona
- DR-4339 (2017): hurricane maria
- DR-4336 (2017): hurricane irma
- DR-4017 (2011): hurricane irene
Guaynabo County: 247 flood insurance claims in FEMA's National Flood Insurance Program records since 1978, most recent 2025.
Guaynabo County: recent federal disaster declarations
- DR-4671 (2022): hurricane fiona
- DR-4339 (2017): hurricane maria
- DR-4336 (2017): hurricane irma
- DR-4017 (2011): hurricane irene
San Juan County: 3106 flood insurance claims in FEMA's National Flood Insurance Program records since 1978, most recent 2024.
San Juan County: recent federal disaster declarations
- DR-4671 (2022): hurricane fiona
- DR-4339 (2017): hurricane maria
- DR-4336 (2017): hurricane irma
- DR-4017 (2011): hurricane irene
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Questions
- Is there a flash flood warning in San Juan, Puerto Rico?
- Yes. The National Weather Service in San Juan issued a Flash Flood Warning for San Juan at 1:28 PM AST. It runs until 4:15 PM AST.
- How much rain has fallen in the warned area?
- Radar indicated that between 1 and 2 inches of rain have fallen. The National Weather Service says another 1 to 2 inches are possible.
- Which areas are under the Flash Flood Warning?
- The warning covers northern Carolina, northern Guaynabo, San Juan and Trujillo Alto in Puerto Rico. It was issued for thunderstorms producing heavy rain, based on radar.
Sources
- NWS San Juan PR: Flash Flood Warning, Oct 19, 2026 weather.gov
- FEMA OpenFEMA: NFIP claims and disaster declarations fema.gov
How this page is made. The Herebeat Hazard Desk builds event pages from official U.S. government data (National Weather Service, USGS, FEMA). The text is written with AI from that data; every number and quote is checked against the official source automatically before publishing, and the page is updated when the agency updates the event. The official source is always the reference. Spotted a mistake? info@herebeat.app. About the Hazard Desk.