75
Recorded events
0
Direct deaths
0
Direct injuries
$15.8M
Property damage
Flash Flood in Middlesex County, Massachusetts: 75 recorded events between 1996 and 2025. The strongest on record measured 0. That places the county #299 nationally and #3 statewide for this hazard.
Decade by decade
Flash Flood in Middlesex County, Massachusetts: events per decade
Reporting practice changed over time — early decades are undercounted, not calmer.
The busiest decade for flash flood in Middlesex County is the 1990s, when 24 of the county's 75 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 Middlesex County archive, flash flood makes up 6.6% of all recorded severe weather across 8 hazard types. Nationally the county sits at #299 for this hazard and #3 within Massachusetts, putting it in the 90.2 percentile of all U.S. counties.
Seasonality
Events by month
Jul is the peak month for flash flood in Middlesex County with 26 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.
Most recent
Latest recorded events
| Date | Location | Magnitude | Damage |
|---|---|---|---|
| Jun 7, 2025 | BEAVER BROOK | 0 | $0 |
| Jun 27, 2024 | FRAMINGHAM | 0 | $0 |
| Aug 18, 2023 | BILLERICA | 0 | $0 |
| Aug 18, 2023 | MAYNARD | 0 | $0 |
| Aug 18, 2023 | (BED)HANSCOM FLD BED | 0 | $0 |
| Jul 29, 2023 | CHESTNUT HILL | 0 | $0 |
| Jul 22, 2023 | EAST EVERETT | 0 | $0 |
| Jul 22, 2023 | UNION MARKET | 0 | $0 |
| Jul 22, 2023 | CAMBRIDGE | 0 | $0 |
| Jul 22, 2023 | WATERTOWN | 0 | $0 |
Other hazards here
More from Middlesex County
- Thunderstorm Wind 627
- Hail 182
- Flood 150
- Lightning 63
From the record
What the reports say
Written by National Weather Service staff at the time of the event · public domain
The most significant flash flooding affected Somerville, where damage was estimated to be around ten million dollars. Several businesses experienced severe flooding, and the Somerville Public Safety Building was inundated with nearly four feet of water. Three police cruisers were destroyed. Two schools and the library were also affected. Over three feet of water flooded Washington Street at McGrath Highway where several cars were stranded. A water rescue was required at an underpass in Union Square as flood waters rapidly inundated a vehicle. Widespread significant street flooding also occurred in Watertown, Belmont, Cambridge, and Medford.
In Waltham, adjacent to Lexington Street, significant flooding occurred in a parking lot full of unoccupied school buses. Eight school buses were unable to be moved due to flood waters reaching as high as the engine battery levels. Broadcast media showed a Twitter photo of this event.
Flash flooding occurred on the Boston College campus in Newton. The lower level of a parking garage flooded, roads on the lower campus were impassable for several hours, |eight vehicles were damaged by flooding, and water damage occurred in 3 buildings (including an ice rink).
Quick answers
Frequently asked
How many flash flood events are on record in Middlesex County, Massachusetts?
75 flash flood events are recorded in Middlesex County between 1996 and 2025, causing 0 direct deaths.
What is the strongest flash flood recorded in Middlesex County?
The strongest flash flood on record in Middlesex County measured 0.
Where does the flash flood data for Middlesex County 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.
Cite this page
“Flash Flood in Middlesex County, Massachusetts.” Severe Weather History. severeweatherhistory.com/county/massachusetts/middlesex-county/flash-flood/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.