High-Impact Weather and Climate Events

High-impact events cause the majority of societal costs related to weather and climate. They provoke societal responses that can either enhance or detract from long-term adaptation to climate risk. In 2015, WWA began a new research focus on extremes that is designed to place high-impact events in the context of historical climate variability and projected climate change, assess how the risk of these events varies over time and space, and examine how high-impact events interact with place-based vulnerability.

The High-Impact Events Database has 280+ historical high-impact weather and climate events in our three-state region, and a complementary set of regional event maps showing how risk varies seasonally across the region for different types of weather and climate events.

The database is a curated collection of significant weather and climate-related events in the Western Water Assessment region. The types of events included are: avalanches, cold waves, dam failures, droughts, floods, hail, high winds, landslides, tornadoes, wildfires, and winter storms. We search federal, state, county, and local databases, library archives, news accounts, and other sources for current and historic notable weather and climate-related events in Colorado, Utah, and Wyoming. This database is not a scientific collection of extreme events. The majority of events included in this database are incidents that were identified as remarkable by one of the sources listed above.

All CPI-Adjusted Damage costs are 2022 values, calculated from: https://www.usinflationcalculator.com/. CPI-Adjusted Damage costs are unavailable before the year 1913.

WWA High-Impact Events Database Map (1864-2021)

This map is a visual representation of all the high-impact events in our database by county from 1864-2021. The counties with no data represent counties with no events explicitly reported in the database.

State County City Date Event Type Deaths Sort ascending CPI Adjusted Unadjusted Summary Links
Colorado Larimer Drake, Loveland, Fort Collins July 31, 1976 Flood 144 $182,364,000.00 $35,500,000.00
Colorado Pueblo Pueblo, Eden August 07, 1904 Flood 111
Colorado Pueblo, Denver, Broomfield Pueblo, Denver, Broomfield June 02, 1921 Flood 78 $1,330,010,000.00 $81,449,000.00
Utah Salt Lake Bingham Canyon February 17, 1926 Avalanche 36
Colorado Las Animas Trinidad, Tabasco, Berwind August 25, 1905 Flood 35 $100,000.00
Colorado El Paso, Elbert, Weld Colorado Springs, Kiowa, Fort Morgan May 30, 1935 Flood 27 $117,943,000.00 $5,528,000.00
Colorado Jefferson, Boulder Evergreen, Morrison, Golden, Eldorado Springs July 24, 1896 Flood 27 $250,000.00
Utah Washington Hildale September 14, 2015 Flood 21 $1,541,540.00 $1,250,000.00
Colorado Adams, Arapahoe, Bent, Douglas, Denver, Elbert, El Paso, Larimer, Pueblo, Morgan, Otero, Prowers, Sedgwick, Weld Denver, Castle Rock, Englewood, Fort Morgan, Sterling, Julesburg, Colorado Springs, Pueblo, Fort Collins, Loveland June 16, 1965 Flood 21 $5,010,790,000.00 $540,000,000.00
Colorado Denver, Arapahoe Denver May 19, 1864 Flood 20 $1,000,000.00
Loading content ...

Sign up to be on our email list!

Get news and updates from Western Water Assessment.

© 2024 Western Water Assessment