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Natural hazards · Grayslake

Grayslake, IL natural hazards

Most of the natural-hazard damage FEMA expects in Grayslake comes from inland flooding, and overall the risk is low for a U.S. community. Flood insurance has paid 14 claims here since 1986. 6 federal disasters brought FEMA money into town.

FEMA National Risk Index, December 2025 · OpenFEMA claims, aid & declarations
Expected damage

How exposed is Grayslake?

35
Low
vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Grayslake to be higher than in 35% of U.S. communities, mostly from inland flooding and tornadoes.

Inland flooding59%Tornadoes17%Cold waves15%Everything else8%
By hazard

What Grayslake faces

Each hazard’s share of the damage FEMA expects here, and how that compares with the rest of the country.

Inland flooding

59% of expected damage
Above average · higher than 60% of U.S. places
Recorded about 2 times a year in the area

Tornadoes

17% of expected damage
Above average · higher than 72% of U.S. places

Cold waves

15% of expected damage
Well below average · higher than 24% of U.S. places
Recorded about 5 times a year in the area

Lower here

HurricanesHailIce stormsWinter weatherHeat wavesWildfireEarthquakesLandslidesStrong windLightningDrought

Not a risk here

Coastal floodingAvalanchesTsunamisVolcanic activity
Flood risk changes street by street. Check a specific address on FEMA’s flood map, and ask about flood insurance before you buy.
Flood insurance claims

Does Grayslake flood?

Every paid claim on a federal flood insurance policy in Grayslake, from FEMA’s records.

14paid claims since 1986
$719Kpaid to owners
0homes flooded more than once
19862026
of homes in flood zones
are insured
of all homes
are insured
No community discount. Grayslake isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Lake County.
Disasters that hit Grayslake

6 federal disasters brought FEMA money here

Disasters the President declared that paid out in Grayslake itself: aid to households, or repair grants to the Village of Grayslake.

Brought FEMA money into GrayslakeDeclared for Lake County only
2013

Severe Storms, Straight-Line Winds, and Flooding

18 households applied for aid $26K aid approved
2011

Severe Winter Storm and Snowstorm

$108K to the Village of Grayslake for repairs
2008

Severe Storms and Flooding

1 household applied for aid $1K aid approved
2008

Record Snow and Near Record Snow

$73K to the Village of Grayslake for repairs
2000

Illinois Winter Snow Storms

$27K to the Village of Grayslake for repairs
1999

Il-Winter Storm 1/1/99

$31K to the Village of Grayslake for repairs
Lake County has had 15 natural disasters declared since 1953, most often winter storms and floods.
Around Grayslake

Grayslake and the towns around it

Round Lake Beach: High, mostly inland floodingGages Lake: Very low, mostly inland floodingLibertyville: Very low, mostly inland floodingAvon: Moderate, mostly inland floodingThird Lake: Low, mostly inland floodingRound Lake Park: Moderate, mostly inland floodingWarren: Very low, mostly inland floodingHainesville: Moderate, mostly inland floodingMundelein: Very low, mostly inland floodingLake Villa: Moderate, mostly inland floodingLindenhurst: Low, mostly inland floodingFremont: Very low, mostly inland floodingLong Lake: Moderate, mostly inland floodingVenetian Village: Low, mostly inland floodingLake Villa: Moderate, mostly inland floodingRound Lake Heights: Moderate, mostly inland floodingRound Lake: Moderate, mostly inland floodingGrant: High, mostly inland floodingGurnee: Low, mostly inland floodingMettawa: Moderate, mostly inland floodingGreen Oaks: Very low, mostly inland floodingVernon Hills: Very low, mostly inland floodingGrandwood Park: Moderate, mostly inland floodingWaukegan: Very low, mostly inland floodingLibertyville: Low, mostly inland floodingNewport: Very low, mostly inland floodingWaukegan: Very low, mostly inland floodingPark City: Very low, mostly inland floodingBeach Park: Very low, mostly inland floodingWadsworth: Very low, mostly inland floodingLong Grove: Low, mostly inland floodingHawthorn Woods: Very low, mostly inland floodingIndian Creek: Very low, mostly inland floodingAntioch: High, mostly inland floodingOld Mill Creek: Very low, mostly inland floodingWauconda: Moderate, mostly inland floodingEla: Low, mostly inland floodingWauconda: Moderate, mostly inland floodingGrayslake: Low, mostly inland flooding GrayslakeRound Lake BeachGages LakeLibertyvilleAvonThird LakeRound Lake ParkWarrenHainesvilleMundeleinLake VillaLindenhurstFremont
Very lowLowModerateHighVery high
Round Lake Beachmostly inland floodingHigh
Avonmostly inland floodingModerate
Round Lake Parkmostly inland floodingModerate
Hainesvillemostly inland floodingModerate
Lake Villamostly inland floodingModerate
Grayslakemostly inland floodingLow
Third Lakemostly inland floodingLow
Lindenhurstmostly inland floodingLow
Warrenmostly inland floodingVery low
Fremontmostly inland floodingVery low
Libertyvillemostly inland floodingVery low
Gages Lakemostly inland floodingVery low
Mundeleinmostly inland floodingVery low
About these numbers

How to read this page

An average, not a forecastFEMA’s National Risk Index estimates the damage 18 kinds of natural hazards cause in a typical year, from decades of records and models. A quiet decade can follow a bad year.
Compared by rate“Higher than N%” compares yearly damage as a share of what’s here, so a big city isn’t rated riskier just for having more buildings. Grayslake covers 5 census tracts, combined by population.
Money that reached townFlood claims are matched to Grayslake’s own flood-insurance community; household aid to the registrant’s city; repair grants to the Village of Grayslake. FEMA’s model follows property values, so a place that recently lost many homes can rate lower than it feels.

FEMA’s expected losses across Grayslake total about $11.4M a year, counting buildings, people and crops.

Sources: FEMA National Risk Index (December 2025); OpenFEMA: NFIP redacted claims, multiple-loss properties, community status book and residential penetration rates, housing assistance (owners and renters), public assistance funded projects, hazard mitigation properties and disaster declarations. Census tracts: U.S. Census Bureau.

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Boundary source: https://tigerweb.geo.census.gov/arcgis/rest/services/TIGERweb/Places_CouSub_ConCity_SubMCD/MapServer/18 · 2025-01-01
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