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Floods in Montana
19 federal floods disaster declarations in Montana since 1953.
Floods — Montana — federal disaster declarations per year
19532026
Counties most affected
Valley County6Park County5Treasure County5Stillwater County5Sanders County4Fergus County4Blaine County4Hill County4Carbon County4Musselshell County4Petroleum County4Pondera County4Powell County4Daniels County4Rosebud County4Glacier County3Jefferson County3Broadwater County3Lewis and Clark County3Lincoln County3McCone County3Missoula County3Dawson County3Toole County3Flathead County3Phillips County3Garfield County3Golden Valley County3Granite County2Chouteau County2Custer County2Wheatland County2Lake County2Cascade County2Liberty County2Yellowstone County2Teton County2Meagher County2Powder River County2Deer Lodge County2Sweet Grass County1Gallatin County1Judith Basin County1Mineral County1Prairie County1Ravalli County1Richland County1Roosevelt County1Sheridan County1Silver Bow County1Big Horn County1
Declarations
April 7, 2026Flood1 counties
SEVERE STORMS AND FLOODING
December 19, 2025Flood2 counties
SEVERE STORMS AND FLOODING
September 11, 2025Flood
SEVERE STORMS, STRAIGHT-LINE WINDS, AND FLOODING
October 11, 2023Flood10 counties
FLOODING
August 12, 2023Flood7 counties
FLOODING
June 16, 2022Flood7 counties
SEVERE STORM AND FLOODING
May 24, 2019Flood8 counties
FLOODING
October 31, 2018Flood9 counties
FLOODING
August 30, 2018Flood7 counties
FLOODING
April 17, 2014Flood15 counties
ICE JAMS AND FLOODING
July 10, 2013Flood12 counties
FLOODING
October 14, 1986Flood7 counties
SEVERE STORMS & FLOODING
March 15, 1986Flood16 counties
HEAVY RAINS, LANDSLIDES & FLOODING
May 27, 1981Flood10 counties
SEVERE STORMS & FLOODING
May 29, 1978Flood7 counties
SEVERE STORMS & FLOODING
June 28, 1975Flood14 counties
RAINS, SHOWMELT, STORMS & FLOODING
January 29, 1974Flood7 counties
SEVERE STORMS, FLOODING & LANDSLIDES
June 9, 1964Flood
HEAVY RAINS & FLOODING
June 6, 1953Flood
FLOODS
Source: OpenFEMA Disaster Declarations Summaries. History is not a forecast.