Photo: LINYperson615 · CC BY-SA 4.0Storms, floods and disasters in New Cassel
New Cassel isn’t graded for hazard risk: New Cassel is a Census area inside a town, graded with the town. Flood insurance has paid 3 claims here since 1978.
What New Cassel faces
Each hazard’s share of the building damage FEMA expects here, and how its rate compares with the rest of the country.
River and rain flooding
Earthquakes
Hurricanes
Shares are of FEMA’s expected building damage, the measure the grade uses; ranks compare each hazard’s building-damage rate with all 85,154 U.S. census tracts. In FEMA’s terms, river and rain flooding is FEMA’s “Inland Flooding” (rivers and streams overflowing their banks, or rain overwhelming drainage). FEMA defines coastal flooding as high or rising tides and storm surge, so surge damage is counted there. Drought isn’t listed: FEMA counts its losses in crops only.
Does New Cassel flood? Rarely: 3 flood claims since 1978
Every paid claim on a federal flood insurance policy in New Cassel, from FEMA’s records.
New Cassel 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.The storms New Cassel remembers
None of the 22 disasters declared for Nassau County shows FEMA aid or repair money reaching New Cassel itself in FEMA’s records, so these are its biggest flood-claim years.
- 19781 flood claims paidNo declaration for the county that year
- 19801 flood claims paidNo declaration for the county that year
- 19811 flood claims paidNo declaration for the county that year
Nassau County has had 22 natural disasters declared by the President since 1953, most often hurricanes and tropical storms, then severe storms. Not counted: the 2005 Hurricane Katrina evacuee emergency, which covered counties that took in evacuees; the 2001 World Trade Center declarations.
Old photos of New Cassel after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the New Cassel archive →New Cassel and its neighbors
How expected damage per building compares across the town line. Tap a town to see its hazards.
| Town | Hazard risk | Mostly (buildings) | Flood claims |
|---|---|---|---|
| Old Westbury | A+less damage than 97% | river and rain flooding | 6 |
| Westbury | A+less damage than 96% | river and rain flooding | 2 |
| North Hempstead | Aless damage than 94% | river and rain flooding | 189 |
| Oyster Bay | Aless damage than 87% | river and rain flooding | 4,654 |
| Hempstead | B+less damage than 65% | river and rain flooding | 19,033 |
| Salisbury | — | a Census area inside a town; graded with the town | |
| Hicksville | — | a Census area inside a town; graded with the town | |
| Jericho | — | a Census area inside a town; graded with the town | |
Hazard risk = FEMA’s expected yearly building damage per dollar of building value, vs. the 21,298 U.S. towns we grade; the map is shaded by fifths of the same scale. Flood claims = paid federal flood insurance claims on record.
Get ready for what New Cassel faces
A short kit for the hazards that drive the building damage here, what to check before you buy, and where neighbors get alerts.
- Turn around at flooded roads: a foot of moving water can carry off a car.
- Flood insurance usually takes 30 days to start, so buy it before the forecast.
- Keep papers and medicines up high, in a grab-and-go bag.
- Drop, cover and hold on.
- Strap tall furniture and the water heater to the wall.
- Know how to shut off the gas.
- The season runs June through November and peaks from mid-August to mid-October.
- Bring in porch furniture and anything the wind can throw.
- Fill the gas tank and charge phones before the storm arrives.
- Look up the address on FEMA’s flood map.
- Ask the seller or landlord whether it has ever flooded, and what flood insurance costs there.
- Get a flood insurance quote early: policies usually start 30 days after you buy.
Know where neighbors sign up for alerts? Add it to the Handbook so everyone has it.
Questions about natural hazards in New Cassel
Does New Cassel flood?
Flood insurance has paid 3 claims in New Cassel since 1978, $21K in all.
Is New Cassel in a flood zone?
Flood zones are drawn street by street, so the answer depends on the address: look it up on FEMA’s flood map. In Nassau County, 76% of homes in mapped flood zones carry federal flood insurance, and 9.6% of all homes do.
How much is flood insurance in New Cassel?
FEMA’s Community Rating System list shows no discount for New Cassel’s flood program. Premiums depend on the building; policies usually start 30 days after you buy, so get a quote early.
Storm stories
Memories, warnings and help from neighbors in New Cassel.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where New Cassel’s residents lived in the 2020 census; 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. Homes: Census ACS 2020–24. Preparedness tips: Ready.gov. FEMA’s model is an average of expected damage, not a forecast. How hazard risk is graded.