Bayamón Municipio, Puerto Rico

What hazards hit Bayamón Municipio most?

The most frequent records are floods and flash floods: 123 since 1997. Census land area gives no figure for Bayamón Municipio under this code, so it carries no per-area rank.

Source: NOAA NCEI Storm Events Database (county and forecast-zone records attributed to the county; a zone record shows its own totals on each county it covers). Days: dates with at least one record of the hazard in the county. Ranks: days with a record per 1,000 square miles of land (Census Bureau 2024 Gazetteer), since 1950 for tornadoes, 1955 for hail and thunderstorm wind, 1996 for the rest.

How many tornadoes has Bayamón Municipio had?

NOAA records 2 tornadoes in Bayamón Municipio from 1974 to 2019, the strongest rated F1, with 0 deaths and 0 injuries recorded in the county. A tornado that crossed a county line is counted in each county it touched, with the length of its path inside the county.

Counted as whole tornadoes rather than county records, the Storm Prediction Center's database holds 1 tornado whose track touched Bayamón Municipio since 1950 (NOAA's county records number 2: they file a crossing tornado once per county segment, and the two databases differ on some tracks); along their whole tracks they killed 0 people.

Map of the strongest tornado tracks in Puerto Rico.

Source: NOAA NCEI Storm Events Database, tornado records by county (path length in the county, maximum width); ratings as published: F scale before February 1, 2007, EF scale after. Whole-track figures: NOAA Storm Prediction Center tornado database (1950-2025). SPC severe weather database.

When was the last damaging storm in Bayamón Municipio?

The most recent record with damage, injuries or deaths is the April 17, 2026 flood ($1,500 in damage in 2025 dollars).

Source: NOAA NCEI Storm Events Database; every record of 2025-2026 is listed, earlier ones when they caused deaths, injuries or $250,000 of damage (2025 dollars), and every tornado.

The deadliest and costliest records

Source: NOAA NCEI Storm Events Database: deaths and injuries direct and indirect; damage is property plus crops as estimated by the National Weather Service, converted to 2025 dollars.

Is it getting more frequent?

Records per decade for Bayamón Municipio's most frequent hazards. Counts rose everywhere after 1996, when NOAA began recording every event type, so compare decades within a hazard's complete period only (the shaded cells come before it).

Rip currents and high surf in the 2020-26: 27 records against 9 in the decade before, 27 of them forecast-zone records. Cells marked z rose mostly through zone records. The local National Weather Service office files these once per forecast zone, so a change in how it draws its zones or splits a storm into records moves this count as much as the weather does; read it beside the Bayamón Municipio days with a record above.

Source: NOAA NCEI Storm Events Database, records per calendar decade; zone records from the CZ_TYPE field (Z).

What time of year?

Records by month in Bayamón Municipio. The two busiest months are in violet.

Source: NOAA NCEI Storm Events Database, records by the month they began.

Federal disaster declarations for Bayamón Municipio

FEMA's register lists 25 declarations that include Bayamón Municipio: 14 major disasters, 11 emergencies and 0 fire management assistance declarations. Most were for hurricane (14) and severe storm (4).

Source: FEMA OpenFEMA Disaster Declarations Summaries (v2), declarations through October 2, 2026; one declaration is counted once however many areas it names. OpenFEMA dataset page.

How many floods has Bayamón Municipio had?

NOAA's Storm Events Database holds 123 flood or flash flood records for Bayamón Municipio from 1997 to 2026, on 70 days, with 1 death. By flood insurance claims since 1978 (OpenFEMA, as of September 8, 2026), Bayamón Municipio ranks 485th of 2,942 U.S. counties.

The National Flood Insurance Program has paid $3.5 million on 522 claims filed in Bayamón Municipio; the most in one year was 137 in 1996. Claims count insured losses only: uninsured flood damage is not in this file.

Source: FEMA OpenFEMA NFIP Redacted Claims, as of September 8, 2026; claims by year of loss, payments in the dollars of the year paid. OpenFEMA dataset page.

Counties that share a border with Bayamón Municipio

1. Guaynabo Municipio 319
2. Bayamón Municipio 293
3. Toa Baja Municipio 227
4. Aguas Buenas Municipio 217
5. Toa Alta Municipio 197
6. Comerío Municipio 153
7. Naranjito Municipio 150
8. Cataño Municipio 66

Source: U.S. Census Bureau county adjacency file; NOAA NCEI Storm Events Database, records since 1950. The Census Bureau's adjacency file.

Next

• Tornadoes in Puerto RicoEvery Puerto Rico tornado since 1950 and the counties with the most per square mile
• Floods in Puerto RicoThe state's floods and flash floods, by county, year and month
• The Puerto Rico recordEvery hazard in the state, its deadliest events and its federal declarations
• FEMA's risk rating for each hazard in Bayamón MunicipioThe hazard risk calculator: 18 hazards beside the county's record
• Download Bayamón Municipio's FEMA declarations (CSV)25 rows: every declaration that named the county, for your own analysis