Severe Weather History


Maryland Heavy Rain History: 744 Recorded Events

743

Recorded events

24

Counties affected

4

Direct deaths

$28K

Property damage

Maryland heavy rain history: 743 recorded events across 24 counties between 1996 and 2024.

Decade by decade

Maryland heavy rain history by decade

Maryland heavy rain history: recorded events per decade
Maryland heavy rain history: recorded events per decade

The 2000s are the busiest decade on record with 340 reported heavy rain events across Maryland. Earlier decades are thinner because systematic reporting for this hazard expanded over time, not because the weather was calmer.

County ranking

Counties with the most heavy rain events in Maryland

RankCountyEventsDeathsDamageSpan
#1Queen Anne's County690$01996–2018
#2Worcester County660$5K1998–2024
#3Wicomico County590$01998–2023
#4Talbot County490$01996–2022
#5Kent County420$01996–2017
#6Caroline County420$01996–2022
#7Cecil County350$01996–2017
#8Dorchester County350$01998–2023
#9Somerset County310$01998–2023
#10Prince George's County310$01999–2005
#11Montgomery County271$20K1999–2005
#12St. Mary's County220$02000–2006
#13Anne Arundel County210$01999–2003
#14Frederick County202$01999–2005
#15Charles County180$02000–2006
#16Baltimore city161$01999–2005
#17Washington County160$01999–2005
#18Howard County160$01999–2003
#19Calvert County140$02000–2006
#20Harford County120$02000–2005
#21Baltimore County110$02000–2005
#22Carroll County110$02000–2003
#23Allegany County70$02000–2005
#24Garrett County20$02018–2018
Source: NOAA/NCEI Storm Events · ranked by recorded event count

Significant events

Deadliest heavy rain events in Maryland

DateCountyScaleDeathsInjuries
Jul 8, 2005Frederick County—20
Oct 9, 2005Montgomery County—11
Jun 28, 2005Baltimore city—10
Source: NOAA/NCEI Storm Events · dates UTC

All hazards in Maryland · Heavy Rain across the U.S.