Crawford County, IA Environment & Hazard Risk
Relatively Low natural hazard risk, led by drought. 544 storm events since 1996.
- Expected yearly loss
- $23.55M
- Relatively Low nationally
- Storm events since 1996
- 544
- Most often thunderstorm wind
- Flood insurance policies
- 2
- 0.0% of homes
- Hurricanes nearby
- 0
- Since 1851
Natural hazard risk
FEMA National Risk Index, December 2025
Overall risk
Relatively Low
Score 60.8 of 100
Social vulnerability
Relatively Low
Score 28.1 of 100
Community resilience
Relatively Low
Score 23.3 of 100
Community resilience runs the other way: a higher rating means a community can recover faster.
Building value exposed: $6.62B · Agriculture value exposed: $515M · Risk-adjusted yearly loss: $22.88M
Risk by hazard
- DroughtRelatively High$5.97M/yr expected annual loss, about 9.6 events a year
- TornadoRelatively Moderate$4.77M/yr expected annual loss, about once every 2 years
- LandslideRelatively Low$16.41K/yr expected annual loss, about once every 2 years
- HailRelatively Moderate$801K/yr expected annual loss, about 5.8 events a year
- Cold waveRelatively Moderate$1.95M/yr expected annual loss, about 7.0 events a year
- Strong windRelatively Moderate$918K/yr expected annual loss, about 4.3 events a year
- Ice stormRelatively Moderate$171K/yr expected annual loss, about once every 1 year
- Winter weatherRelatively Low$64.45K/yr expected annual loss, about 15 events a year
- WildfireVery Low$39.89K/yr expected annual loss, about once every 1,026 years
- Heat waveVery Low$152K/yr expected annual loss, about 5.7 events a year
- LightningRelatively Low$104K/yr expected annual loss, about 44 events a year
- EarthquakeVery Low$10.41K/yr expected annual loss, about once every 2,584 years
Bars show the national percentile score (0 to 100) for each hazard. Dollar figures are expected annual losses to buildings, people and crops. Not rated here: avalanche, coastal flooding, hurricane, riverine flooding, tsunami, volcanic activity.
Flood risk and insurance
National Flood Insurance Program and FEMA flood maps
Check the flood zone for an address
- Homes with flood insurance
- 2 of 19,871 (0.0%)
- Homes in high-risk flood zones
- 0
- Flood claims since 1978
- 88
- Claims paid since 1978
- $1.7M
Flood claims paid per year
- Midwest Flooding$257K · 12 claims
- Storm$115K · 8 claims
- Flooding$8,570 · 1 claim
Storm history
Since 1996: 544 events, 0 deaths, $163M in damage
- Thunderstorm Wind140
- Hail124
- Heavy Rain37
- High Wind36
- Drought35
- Tornado24
- Heavy Snow22
- Blizzard22
- Winter Storm20
- Flash Flood20
Events per year
38 tornadoes on record (EF0 4, EF1 3, EF2 1, F0 11, F1 8, F2 6, F3 2).
Most damaging storms
Since 1996, ranked by deaths, injuries and damage
- Drought07/01/2012
Crawford
$45M damage
What happened
Very warm and dry weather that began in the spring continued into the summer. Temperatures warmed sharply the last few days of June. The heat persisted into July. Temperatures for the month of July were among the warmest on record. In Des Moines, the monthly mean temperature was the second highest of record, only eclipsed by July of 1936. Rainfall was in short supply across the state. Much of the state recorded less than 50% of normal rainfall for the month, with a few locations under 10% of normal. In addition, extended periods of temperatures above 95 F resulted in problems with pollination of the crops. Rapid deterioration of the corn and soybean crop took place with several periods of temperatures in excess of 100 degrees. By the end of the month, officials estimated that 20% of the crop yield had been lost to the drought. At the current price, the loss total was in excess of $2.25 billion. As of 31 July, the USDA reported that Secretarial Primary Drought Designations had been listed for 21 counties in the Des Moines CWA, with 11 receiving Contiguous Designation. The primary counties were Butler, Bremer, Hamilton, Hardin, Grundy, Black Hawk, Boone, Story,...
- Drought08/01/2013
Crawford
$21M damage
What happened
Serious drought conditions gripped the state through the summer months. Initial sub-soil moisture was good at the beginning of the growing season. The recharged soil was sufficient to maintain the crops through a good part of the summer. Rainfall remained low through August as well and crops deteriorated rapidly under the warmer than normal and very dry conditions. Rainfall for the summer was between 1/3 and 2/3rds of normal across much of the Des Moines CWA. A large part of the CWA received under 5% of normal rainfall in August, with most areas under 20%. Crop loss through the month was around 10%. This translated to over $600 million in crop loss for the corn crop, and about $350 million for soybeans.
- Flood06/12/2010
Ricketts, Crawford County
$20M damage
What happened
Heavy rainfall during the month of June caused considerable crop losses across the state. Crop damage was done through a combination of inundation flooding and losses due to crops not being able to be planted or rotting in the ground. It is not possible to get a clear breakdown of the percent of damage that can be attributed to each cause. The damage here is not related to the river flooding. Those flooding events are addressed in other flooding entries. Many of the southern Iowa counties were unable to plant crops at all through June, while areas of the central and north lost the crops that were planted through drowning or washouts. Estimates from the state and county extension offices indicated that about 10% of the crop was lost across the state. The amount of loss in the DMX CWA was around $1 billion to the corn and soybean crop. By the end of the month, Iowa Governor Culver declared 32 counties state disaster areas. They were Black Hawk, Buena Vista, Butler, Cherokee, Clay, Davis, Decatur, Emmet, Franklin, Hamilton, Hancock, Howard, Humboldt, Jasper, Jefferson, Kossuth, Lee, Lyon, Mahaska, Madison, Marion, Monroe, O'Brien, Osceola, Palo Alto, Polk, Ringgold,...
- Drought08/01/2003
Crawford
$12.65M damage
What happened
Dry weather settled in over Iowa during the month. The last widespread rain occurred on 09 July. With the increasingly dry conditions became a primary concern as the month progressed. An extended period of heat and humidity from the 15th to 25th saw highs into the 90s to over 100 degrees F. in some locations. By month's end drought indices had worsened to severe to extreme drought across south central Iowa and at least moderate drought over the remainder of the HSA. Waterloo had its driest August on record, Des Moines its 3rd driest and Ottumwa its 8th driest. A cold front brought only a brief respite from the intense heat, as temperatures rebounded into the 90s to near 100 degrees F. on the 24-26th. Des Moines Airport reached the century mark for the first time since July 29, 1999, reaching 100 F. on the 24th and 101 F. on the 25th. This was followed by a slow cool down as several pushes of cooler air traversed the state. Unfortunately there was only widely scattered convection across the HSA on the 27th and 28th, providing little significant drought relief. Light to moderate rainfall on the 31st fell across primarily the southern one half of the HSA, with the heaviest...
- Drought08/01/2001
Crawford
$11.35M damage
What happened
In what became a rather tough growing season, drought developed in Iowa during the month of July, and became serious in August. During the early part of the growing season, excessive rainfall caused significant planting delays across the state. Once the crop was planted, cool and cloudy weather settled into the state slowing crop maturation. Once the warm weather finally arrived, rainfall tailed off significantly. Very little rainfall was reported during the month of July, however crops flourished with the moisture that was available. During the last half of July, temperatures began to soar into the 90s quite regularly. Temperatures were in the 90s to around 100 for most of the first 10 to 12 days of August with virtually no rainfall. Moisture reserves ran out during the critical time of pod filling for the soybeans and at the tasseling for the corn. Another factor that complicated the situation was the soil moisture profile over central and southwest Iowa. After two years of drought, rain began falling during the last fall of 2000 and continued into the spring of 2001. Though soil moisture was replenished in part, a layer of dry soil remained below the moistened...
- Flash Flood06/21/1996
Denison, Crawford County
$11.15M damage
Latest storm reports
Newest first
- Heavy Snow02/20/2026
Crawford
- Thunderstorm Wind55 kt wind08/09/2025
Westside, Crawford County
$10K damage
- Thunderstorm Wind56 kt wind08/09/2025
Vail, Crawford County
- Thunderstorm Wind56 kt wind08/09/2025
Manilla, Crawford County
$1,000 damage
- Blizzard03/19/2025
Crawford
- High Wind37 kt wind03/19/2025
Crawford
- Thunderstorm Wind51 kt wind03/15/2025
Denison Muni Arpt, Crawford County
- Blizzard03/05/2025
Crawford
Drinking water
10 community water systems serve about 15,526 people. Violations since 2021.
None of the systems serving this county had a health-based violation in this period.
- Denison Water SupplyServes 9,381 · Groundwater · Local governmentNo health violations
- W Central Rwa - Denison SubsysServes 2,428 · Purchased groundwater · PrivateNo health violations
- Schleswig Munic Water SupplyServes 803 · Purchased groundwater · Local governmentNo health violations
- Manilla Muni Service DeptServes 758 · Groundwater · Local governmentNo health violations+2 monitoring or reporting
- Charter Oak Water SupplyServes 522 · Purchased groundwater · Local governmentNo health violations
- Dow City Water WorksServes 467 · Groundwater · Local governmentNo health violations
- Vail Water SupplyServes 383 · Purchased groundwater · Local governmentNo health violations+1 monitoring or reporting
- Westside Water SupplyServes 277 · Purchased groundwater · Local governmentNo health violations+2 monitoring or reporting
Largest systems by population served. Monitoring and reporting violations mean required tests or notices were late or missing, not that the water was unsafe.
Climate
1991-2020 normals at Denison, 2.7 mi from the county center
Summer highs peak around 83°F in Jul and winter lows bottom out near 10°F in Jan. About 33.6 inches of rain falls in a typical year, with 34.5 inches of snow.
| Month | High | Low | Rain | Snow |
|---|---|---|---|---|
| Jan | 27°F | 10°F | 0.74 in | 8.1 in |
| Feb | 32°F | 14°F | 0.98 in | 9.2 in |
| Mar | 45°F | 25°F | 1.88 in | 4.7 in |
| Apr | 58°F | 36°F | 3.38 in | 1.6 in |
| May | 70°F | 49°F | 4.62 in | 0.1 in |
| Jun | 80°F | 59°F | 4.92 in | - |
| Jul | 83°F | 63°F | 4.13 in | - |
| Aug | 81°F | 61°F | 4.43 in | - |
| Sep | 75°F | 52°F | 3.27 in | - |
| Oct | 62°F | 39°F | 2.64 in | 0.5 in |
| Nov | 46°F | 26°F | 1.45 in | 2.4 in |
| Dec | 32°F | 16°F | 1.20 in | 7.9 in |
| Year | 47°F average | 33.6 in | 34.5 in | |
Pollution sites
0 Superfund sites and 2 toxic release facilities in Crawford County
Superfund sites
None in this county.
Toxic release facilities
- Smithfield Fresh Meats Corp-Denison39,336 lbs released, Denison
- The Andersons Marathon Holdings LLC - Denison Facility15,860 lbs released, Denison
Total: 55,196 lbs in 2024, 50,310 lbs to air.
Superfund sitesToxic release facilitiesEPA inspections and enforcementAir toxics cancer risk11 historic places
Frequently asked questions
- How risky is Crawford County for natural disasters?
- FEMA rates Crawford County relatively low for overall natural hazard risk, with expected losses of $23.55M a year. The highest-rated hazards are drought (relatively high), tornado (relatively moderate), landslide (relatively low).
- What storms are most common in Crawford County?
- Since 1996, NOAA recorded 544 storm events affecting Crawford County, most often thunderstorm wind (140), hail (124), heavy rain (37).
- How many tornadoes have hit Crawford County?
- 38 tornadoes have been recorded in Crawford County since 1950, including 2 rated F3/EF3 or stronger.
- How many homes in Crawford County have flood insurance?
- 2 residential flood insurance policies are in force in Crawford County, covering about 0.0% of homes. The program has paid $1.7M on 88 claims here since 1978.
- What is the weather like in Crawford County?
- At Denison, average highs reach 83°F in Jul and lows fall to 10°F in Jan, with 33.6 inches of rain a year (1991-2020 normals).
Source: FEMA (National Risk Index, NFIP), NOAA (Storm Events, HURDAT2, Climate Normals), EPA · Last updated 08/01/2026 · Storm counts include events in forecast zones that touch the county. This product uses the FEMA OpenFEMA API, but is not endorsed by FEMA.