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Risk: Very Low

Lucas County, IA Environment & Hazard Risk

Very Low natural hazard risk, led by drought. 463 storm events since 1996.

Expected yearly loss
$7.86M
Very Low nationally
Storm events since 1996
463
Most often flood
Hurricanes nearby
0
1 tropical storm or stronger since 1900

Natural hazard risk

FEMA National Risk Index, December 2025

Overall risk

Very Low

Score 29.7 of 100

Social vulnerability

Relatively High

Score 69.1 of 100

Community resilience

Very High

Score 81.3 of 100

Community resilience runs the other way: a higher rating means a community can recover faster.

Building value exposed: $2.78B · Agriculture value exposed: $64.53M · Risk-adjusted yearly loss: $10.06M

Risk by hazard

  • DroughtRelatively High$1.94M/yr expected annual loss, about 12 events a year
  • LandslideRelatively Low$6,871/yr expected annual loss, about once every 3 years
  • HailRelatively Low$357K/yr expected annual loss, about 5.4 events a year
  • Cold waveRelatively Low$1.06M/yr expected annual loss, about 4.7 events a year
  • TornadoRelatively Low$1.29M/yr expected annual loss, about once every 3 years
  • Heat waveRelatively Low$385K/yr expected annual loss, about 7.6 events a year
  • WildfireVery Low$49.92K/yr expected annual loss, about once every 820 years
  • Strong windRelatively Low$469K/yr expected annual loss, about 5.2 events a year
  • Ice stormRelatively Low$23.38K/yr expected annual loss, about once every 2 years
  • EarthquakeVery Low$33.67K/yr expected annual loss, about once every 1,297 years
  • Winter weatherVery Low$15.74K/yr expected annual loss, about 11 events a year
  • LightningVery Low$42.14K/yr expected annual loss, about 45 events a year
  • HurricaneVery Low$889/yr expected annual loss, about once every 174 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, 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 in high-risk flood zones
9
Flood claims since 1978
5
Claims paid since 1978
$19.11K
  • Midwest Flooding$11.78K · 2 claims

Storm history

Since 1996: 463 events, 1 death, $152M in damage

  • Flood90
  • Thunderstorm Wind72
  • Hail66
  • Heavy Rain47
  • Drought33
  • Winter Storm25
  • Heavy Snow23
  • High Wind22
  • Flash Flood17
  • Ice Storm15

Events per year

Storm events per year in Lucas County
13
40
22
20
14
9
16
17
22
11
11
11
18
9
20
21
10
14
4

13 tornadoes on record (EF0 1, EF1 1, EF3 1, F0 4, F1 1, F2 1, F3 1, F4 1).

Most damaging storms

Since 1996, ranked by deaths, injuries and damage

  • Drought07/01/2012

    Lucas

    $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

    Lucas

    $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

    Norwood, Lucas 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

    Lucas

    $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...

  • TornadoEF3, 11.28 mi path, 350 yd wide03/06/2022

    Derby, Lucas County

    1 death, 1 injured, $1.5M damage

    What happened

    This tornado formed as two other tornadoes dissipated in southern Lucas county. The tornado moved to the northeast across rural areas of southern into central Lucas county primarily in wooded areas and cropland with little damage. Of note however, was a satellite tornado observed in chasing video (in seperate Storm Data entry) which developed north of the main tornado and moved south toward the main circulation, doing a complete revolution around the main tornado before being absorbed. Shortly afterwards, the tornado crossed State Highway 14 south of Chariton destroying a conservation center which was rated EF3. The tornado continued to the northeast removing a roof from a house along 235th Trail and passed through an open field before entering Red Haw State Park. The tornado ripped through a campground in the park with one fatality and one injury occurring. The tornado exited the park and crossed Highway 34 east of Chariton with numerous outbuildings and power poles damage or destroyed. The tornado then remained in rural wooded areas and cropland for the rest of its path with little additional damage noted.

  • Drought08/01/2001

    Lucas

    $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...

Latest storm reports

Newest first

  • Blizzard03/05/2025

    Lucas

  • High Wind52 kt wind03/05/2025

    Lucas

  • Winter Storm02/12/2025

    Lucas

  • Extreme Cold/Wind Chill01/21/2025

    Lucas

  • Thunderstorm Wind54 kt wind10/31/2024

    Russell, Lucas County

  • Thunderstorm Wind57 kt wind07/30/2024

    Chariton Muni Arpt, Lucas County

  • Hail1.5" hail06/26/2024

    Chariton, Lucas County

  • Hail1.75" hail05/24/2024

    Derby, Lucas County

Hurricanes and tropical storms

Storms whose track crossed Lucas County, with the wind when it passed

Drinking water

3 community water systems serve about 37,858 people. Violations since 2021.

None of the systems serving this county had a health-based violation in this period.

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 Chariton 1 E, 3 mi from the county center

Summer highs peak around 85°F in Jul and winter lows bottom out near 11°F in Jan. About 37.3 inches of rain falls in a typical year, with 24.1 inches of snow.

MonthHighLowRainSnow
Jan31°F11°F0.96 in7.9 in
Feb36°F14°F1.40 in6.5 in
Mar49°F25°F1.90 in3.5 in
Apr61°F35°F4.15 in0.8 in
May71°F47°F5.39 in-
Jun80°F57°F4.92 in-
Jul85°F62°F4.21 in-
Aug83°F59°F4.40 in-
Sep76°F50°F3.71 in-
Oct64°F38°F2.98 in0.3 in
Nov49°F26°F2.03 in2.0 in
Dec37°F16°F1.27 in3.1 in
Year48°F average37.3 in24.1 in

Pollution sites

0 Superfund sites and 2 toxic release facilities in Lucas County

Superfund sites

None in this county.

Toxic release facilities

Total: 227 lbs in 2024, 227 lbs to air.

Superfund sitesToxic release facilitiesEPA inspections and enforcementAir toxics cancer risk14 historic places

Frequently asked questions

How risky is Lucas County for natural disasters?
FEMA rates Lucas County very low for overall natural hazard risk, with expected losses of $7.86M a year. The highest-rated hazards are drought (relatively high), landslide (relatively low), hail (relatively low).
What storms are most common in Lucas County?
Since 1996, NOAA recorded 463 storm events affecting Lucas County, most often flood (90), thunderstorm wind (72), hail (66).
How many tornadoes have hit Lucas County?
13 tornadoes have been recorded in Lucas County since 1950, including 3 rated F3/EF3 or stronger.
What is the weather like in Lucas County?
At Chariton 1 E, average highs reach 85°F in Jul and lows fall to 11°F in Jan, with 37.3 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.