Flood in Guaynabo Municipio, Puerto Rico

Flood in Guaynabo Municipio, Puerto Rico: 50 recorded events between 2009 and 2025. The strongest on record measured 0. That places the county #245 nationally and #7 statewide for this hazard.

Reporting practice changed over time — early decades are undercounted, not calmer.

The busiest decade for flood in Guaynabo Municipio is the 2020s, when 26 of the county's 50 recorded events were logged. Comparing decades is useful for spotting active periods, but the earliest years are thin because systematic reporting for this hazard began later.

Within the Guaynabo Municipio archive, flood makes up 35.5% of all recorded severe weather across 7 hazard types. Nationally the county sits at #245 for this hazard and #7 within Puerto Rico, putting it in the 91.8 percentile of all U.S. counties.

Sep is the peak month for flood in Guaynabo Municipio with 10 recorded events, while Jan is the quietest. Seasonality here is a property of the archive as much as the climate: reports cluster where population and spotter networks are densest.

• Flash Flood 67

Written by National Weather Service staff at the time of the event · public domain

How many flood events are on record in Guaynabo Municipio, Puerto Rico?

50 flood events are recorded in Guaynabo Municipio between 2009 and 2025, causing 0 direct deaths.

What is the strongest flood recorded in Guaynabo Municipio?

The strongest flood on record in Guaynabo Municipio measured 0.

Where does the flood data for Guaynabo Municipio come from?

All events come from the NOAA/NCEI Storm Events Database, the federal public-domain archive of severe weather reports. Dates are UTC, damage is as reported and not inflation-adjusted, and the most recent entries may still be revised.