Natural hazards · Old Brookville

Old Brookville, NY natural hazards

Most of the natural-hazard damage FEMA expects in Old Brookville comes from inland flooding, and overall the risk is very low for a U.S. community. 1 federal disaster brought FEMA money into town.

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

Expected damage

How exposed is Old Brookville?

Very low

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Old Brookville to be higher than in 12% of U.S. communities, mostly from inland flooding.

Inland flooding69%Hurricanes12%Earthquakes11%Everything else9%

By hazard

What Old Brookville faces

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

Inland flooding

69% of expected damage

Well below average · higher than 21% of U.S. places

Recorded about 3 times a year in the area

Hurricanes

12% of expected damage

Well above average · higher than 79% of U.S. places

Recorded about once every 6 years in the area

Earthquakes

11% of expected damage

Above average · higher than 68% of U.S. places

Lower here

TornadoesHailIce stormsWinter weatherCold wavesHeat wavesWildfireLandslidesStrong 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 Old Brookville flood?

FEMA's records show no paid flood insurance claims in Old Brookville.

of homes in flood zones
are insured

of all homes
are insured

No community discount. Old Brookville isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.

Insurance rates: Nassau County.

Disasters that hit Old Brookville

1 federal disaster brought FEMA money here

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

Brought FEMA money into Old BrookvilleDeclared for Nassau County only

2021

Remnants of Hurricane Ida

1 household applied for aid $7K aid approved

Nassau County has had 24 natural disasters declared since 1953, most often hurricanes and severe storms.

Around Old Brookville

Old Brookville and the towns around it

Very lowLowModerateHighVery high

Matinecockmostly inland floodingVery low

Old Brookvillemostly inland floodingVery low

Upper Brookvillemostly inland floodingVery low

Roslyn Harbormostly inland floodingVery low

Brookvillemostly 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. Old Brookville is smaller than a census tract, so it shares the figures of the tract around its center.

Money that reached townFlood claims are matched to Old Brookville’s own flood-insurance community; household aid to the registrant’s city; repair grants to the Village of Old Brookville. FEMA’s model follows property values, so a place that recently lost many homes can rate lower than it feels.

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.