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Risk: Very Low

Sullivan County, MO Environment & Hazard Risk

Very Low natural hazard risk, led by landslide. 261 storm events since 1996.

Expected yearly loss
$4.4M
Very Low nationally
Storm events since 1996
261
Most often hail
Hurricanes nearby
0
Since 1851

Natural hazard risk

FEMA National Risk Index, December 2025

Overall risk

Very Low

Score 10.1 of 100

Social vulnerability

Relatively Moderate

Score 53.1 of 100

Community resilience

Relatively Moderate

Score 44.0 of 100

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

Building value exposed: $1.6B · Agriculture value exposed: $230M · Risk-adjusted yearly loss: $5.1M

Risk by hazard

  • LandslideRelatively Low$16.6K/yr expected annual loss, about once every 2 years
  • DroughtRelatively Moderate$488K/yr expected annual loss, about 14 events a year
  • TornadoRelatively Low$1M/yr expected annual loss, about once every 3 years
  • Heat waveRelatively Low$295K/yr expected annual loss, about 8.1 events a year
  • WildfireVery Low$27.3K/yr expected annual loss, about once every 1,008 years
  • HailRelatively Low$175K/yr expected annual loss, about 3.7 events a year
  • Cold waveRelatively Low$611K/yr expected annual loss, about 4.6 events a year
  • LightningRelatively Low$85.5K/yr expected annual loss, about 47 events a year
  • Strong windRelatively Low$194K/yr expected annual loss, about 3.2 events a year
  • EarthquakeVery Low$29.6K/yr expected annual loss, about once every 1,042 years
  • HurricaneVery Low$3,974/yr expected annual loss, about once every 100 years
  • Winter weatherVery Low$10.4K/yr expected annual loss, about 12 events a year
  • Ice stormVery Low$4,763/yr expected annual loss, about once every 4 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
0
Flood claims since 1978
2
Claims paid since 1978
$329

Storm history

Since 1996: 261 events, 1 death, $1M in damage

  • Hail78
  • Thunderstorm Wind59
  • Winter Storm23
  • Drought22
  • Heat12
  • Flash Flood10
  • Heavy Snow10
  • Extreme Cold/Wind Chill9
  • Winter Weather7
  • Ice Storm7
Beta

Events per year

Storm events per year in Sullivan County
12
13
9
11
19
11
11
12
16
2
2
16
6
4
5
7
6
5
7
4
Beta

9 tornadoes on record (EF0 5, EF1 1, F1 3).

Most damaging storms

Since 1996, ranked by deaths, injuries and damage

  • TornadoEF1, 4.35 mi path, 100 yd wide05/13/2009

    Milan, Sullivan County

    1 death, $25K damage

    What happened

    An EF1 tornado touched down at 1610 CST, about two miles north-northeast of Milan. The tornado proceeded east-northeast, and lifted about three and a half miles south-southeast of Boynton, at 1635 CST. The tornado destroyed a mobile home and killed a female occupant. Numerous trees were uprooted or damaged.

  • Heavy Snow04/10/1997

    Sullivan

    $750K damage

    What happened

    Heavy wet snow fell across the Northern third of Missouri throughout the day on the 10th followed by a second band of snow during the early morning hours of the 11th. Since temperatures were near or slightly over freezing during the snowfall, some of the snow melted quickly but 6 to 12 inches of snow accumulated with well over a foot in many locations. The heaviest snow fell along and to the north of Highway 136 from Albany in Gentry County to Prineton in Mercer County to Lancaster in Schuyler County. The greatest totals were recorded in Schuyler and Mercer Counties where 20-24 inches of snow was reported. Schuyler County Emergency Management reported 24 inches of snow at Lancaster and a Mercer County Cooperative Observer measured 20 inches of snow in Lake Pahoe. Mercer County Emergency Management officials reported 18 inches of snowfall in Mercer and 14 inches in Priceton. Elsewhere in Northern Missouri, Cooperative Observers reported 17 inches of snow in Grant City, 14 inches in Bethany and 13 to 18 inches in Unionville. Observers in Albany reported 15 to 20 inches of heavy wet snow. In Schuyler County, just over 2 million dollars of damage was reported as a...

  • Flash Flood08/28/2004

    Milan, Sullivan County

    $100K damage

Drinking water

7 community water systems serve about 7,193 people. Violations since 2021.

2 systems had health-based violations, such as a contaminant over the legal limit or a missed treatment step. 2 systems had a violation of any kind still open at last report.

  • Sullivan County Pwsd 1Serves 4,412 · Purchased surface water · Local governmentNo health violations
  • Milan PwsServes 1,759 · Purchased surface water · Local government1 health violation+2 monitoring or reporting
  • Green City PwsServes 578 · Purchased surface water · Local government1 health violation+3 monitoring or reporting
  • Green Castle PwsServes 212 · Purchased surface water · Local governmentNo health violations+2 monitoring or reporting
  • Newtown PwsServes 109 · Purchased surface water · Local governmentNo health violations+1 monitoring or reporting
  • Humphreys PwsServes 98 · Purchased surface water · Local governmentNo health violations
  • North Central Mo Regional Water ComServes 25 · Surface water · Local governmentNo health violations+3 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.

Pollution sites

0 Superfund sites and 1 toxic release facility in Sullivan County

Superfund sites

None in this county.

Toxic release facilities

Total: 344,940 lbs in 2024, 6,526 lbs to air.

Superfund sitesToxic release facilitiesEPA inspections and enforcementAir toxics cancer risk5 historic places

Frequently asked questions

How risky is Sullivan County for natural disasters?
FEMA rates Sullivan County very low for overall natural hazard risk, with expected losses of $4.4M a year. The highest-rated hazards are landslide (relatively low), drought (relatively moderate), tornado (relatively low).
What storms are most common in Sullivan County?
Since 1996, NOAA recorded 261 storm events affecting Sullivan County, most often hail (78), thunderstorm wind (59), winter storm (23).
How many tornadoes have hit Sullivan County?
9 tornadoes have been recorded in Sullivan County since 1950.
What is the weather like in Sullivan County?
At Green City 5n, average highs reach 85°F in Jul and lows fall to 13°F in Jan, with 40.7 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.

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