Heavy Rain in Puerto Rico
Every heavy rain event the National Weather Service has filed in Puerto Rico, year by year, with the most significant episodes. Rainfall totals unusual for the place and season that did not produce a flood.
The most significant on the map
The most significant heavy rain episodes in Puerto Rico.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The record
- Events
- 769
- Deaths
- 13
- Injuries
- 10
- Damage
- $911,000
Every year
The most significant
Ranked by deaths, injuries, damage and size together.
- Flash Flooding and Flooding in Puerto Rico, September 21 to 23, 2008During the three day period of September 21-23, 2008, parts of Puerto Rico suffered from one of the most catastrophic flooding events of the season to date. The flooding affected many municipalities island wide.
- Heavy Rain in Puerto Rico, October 26, 1998A surge of water in Rio Fajardo washed away and drowned one adult and two children.
- Flash Flooding and Flood in Puerto Rico, May 28 to 29, 2010Deep moisture, combined with favorable atmospheric conditions, local effects and a low level trough to the north of Puerto Rico, brought widespread flooding rains across Puerto Rico during the last few days of the month.
- Heavy Rain in Puerto Rico, December 3, 1998A rush of water in a stream in the Yunque Caribbean National Forest swept away three people killing two of them and injuring the other one.
- Heavy Rain in Puerto Rico, October 24, 1999Heavy Rain across the Sierra de Luquillo Mountains produced a water rush over Espiritu Santo river in Rio Grande. Two people drowned when they were swept by the waters.
- Heavy Rain in Puerto Rico, April 19, 2005Afternoon showers and thunderstorms produced 5 to 6 inches of rainfall across portions of the Luquillo rainforest. Runoff from this rainfall caused the River Fajardo to swell.
- Flash Flooding and Flooding in Puerto Rico, October 25 to 26, 2012Showers and thunderstorms associated with the outer bands of Hurricane Sandy were strong enough to produce moderate to major flooding across the Guayanilla and Caguas area between October 25th and October 27th.
- Flash Flooding and Debris Flows in Puerto Rico, December 24 to 25, 2009December 24th and December 25th stood out because they were the wettest days of the month which in turn evolved into the most hydrologically active period across the region. By the evening of December 24th, a Flood Watch was issued for most of Puerto Rico and the U.S.
- Flood and Heavy Rain in Puerto Rico, January 22, 2009A cold front was extending from the West Central Atlantic south southwest through the Mona Passage. Ahead of the front, low level wind flow and moisture posed a threat of slow moving rain cells and flash flood potential.
- Heavy Rain in Puerto Rico, May 30, 1999Very heavy rain occurred over the northern slopes of Puerto Rico during the afternoon. Doppler Radar indicated around three inches or rain over parts of the northwest Puerto Rico.
- Heavy Rain in Puerto Rico, August 22, 1999Civil Defense indicated that three girls, from 14 to 16 years old, were swept over Rio Grande de Anasco by a water surge. Two of them were rescued and one drowned.
- Heavy Rain in Puerto Rico, June 9, 1999Heavy rain during the afternoon hours over parts of northwest Puerto Rico, upstream of Rio Grande de Anasco, produce a sudden rise in the stage near Anasco. Two fishermen at the mouth of the river were swept away. One could reach the shore and the other one drowned.
- Heavy Rain in Puerto Rico, December 21, 2001A 19 year old male was at a family picnic along Blanco River in Naguabo, when a sudden water rush swept him away.
- Flash Flooding and Flooding in Puerto Rico, September 12 to 13, 2011Maria was first designated Tropical Depression 14 on September 6 in the far eastern Atlantic. By the following day the depression was upgraded and named Tropical Storm Maria at 1100 am AST, the 13th named storm of the season, while it was moving rapidly westward.
- Flash Flooding and Debris Flows in Puerto Rico, December 10 to 12, 2007On December 10, 2007, a persistent area of low pressure just north Saint Thomas, U.S. Virgin Islands, rapidly developed into Subtropical storm Olga. Olga was the 10th tropical cyclone to develop during the month of December in roughly 150 years of records.
- Flash Flooding and Flood in Puerto Rico, February 4, 2017An upper disturbance located to the north of the region in combination with a surge of moisture within the prevailing trades produced locally and diurnally induced afternoon showers across portions of interior and western PR.
- Flash Flooding and Debris Flows in Puerto Rico, April 21 to 23, 2007April began with dry weather but a wet pattern slowly emerged over the region by mid-April which led to lots of heavy rainfall towards the end of the month.
- Flash Flooding and Debris Flows in Puerto Rico, September 21, 2003A weak tropical wave entering the Lesser Antilles interacted with mid to upper level low pressure located northwest of Puerto Rico to generate heavy rains , landslides and flash flooding over many municipalities.
- Flash Flood and Debris Flow in Puerto Rico, May 14 to 18, 2011A broad trough associated with a persistent surface low north of the area and a wide northeast to southwest swath of moisture south of Puerto Rico moved very slowly east and created a highly unstable environment across the local area.
- Flash Flooding and Heavy Rain in Puerto Rico, April 22, 2006NWS doppler radar indicated a line of strong showers and thunderstorms producing heavy rain over the area of Quebradillas and Isabela.
- Flash Flooding and Flooding in Puerto Rico, July 18, 2013A very strong Tropical Wave moved over Puerto Rico during July 18, 2013. This wave brought deep topical moisture from the Intertropical Convergence Zone(ITCZ) through the area.
- Debris Flow and Flooding in Puerto Rico, December 13, 2008A band of moisture that moved across Puerto Rico combined with local effects and favorable conditions at the middle and upper levels of the atmosphere and produced scattered to numerous afternoon showers and isolated thunderstorm over the north central and northwest sections of…
- Flash Flooding and Heavy Rain in Puerto Rico, October 8 to 9, 2017An east-southeasterly wind flow, plenty of tropical moisture and saturated soils combined to result in numerous to widespread showers and thunderstorms across the islands. These weather conditions enhance flash flooding during this period.
- Heavy Rain in Puerto Rico, October 24, 2009Fairly light winds allowed for locally heavy showers to develop over the northwest section of Puerto Rico during the afternoon.
- Heavy Rain in Puerto Rico, May 5, 2000Heavy rain across the San Juan metropolitan area caused a water rush in Puerto Nuevo river. Four children between 6 to 11 years old were were swept away by the waters and later rescued by police personnel. Four policemen and three children suffered minor injuries.
More
Sources
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24.