FEMA puts Black Brook’s expected hazard damage per building below that of 78% of U.S. towns, mostly from river and rain flooding
On FEMA’s National Risk Index, Black Brook gets an A− for hazard risk: lower expected damage per building than 78% of U.S. towns. Most of that expected damage is river and rain flooding (62%), then tornadoes (15%). FEMA’s files show no paid flood insurance claims here.
Graded on FEMA’s expected yearly building damage per dollar of building value (NRI v1.20, December 2025), weighted by where residents live; flood claims are shown, not graded. How hazard risk is graded
What Black Brook 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
Tornadoes
Hail
Strong wind
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.
What’s behind Black Brook’s grade
River and rain flooding is 62% of the building damage FEMA expects in Black Brook, and Black Brook’s rate of river and rain flooding damage is lower than 75% of U.S. census tracts. Hail adds 12%, at a rate in the top 10% of U.S. census tracts.
A− lower expected damage per building than 78% of U.S. towns (21,298).
Black Brook’s residents live in 3 census tracts; FEMA’s figures are combined by where they live.
In dollars, FEMA expects about $748K a year in losses across Black Brook: $391K to buildings, the rest to people and crops.
Does Black Brook flood? No paid flood claims on record
FEMA’s records show no paid flood insurance claims in Black Brook. That’s not a promise: most homes don’t carry flood insurance, so small floods go unrecorded.
Black Brook isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Polk County.2 federal disasters brought FEMA money to Black Brook
Disasters that paid out in Black Brook itself (aid to households or repair grants to the Town of Black Brook), newest first, with that year’s flood claims.
- 2002Severe Storms, Tornadoes and Flooding$3K to the Town of Black Brook for repairs
- 2001Flooding, Severe Storms and Tornadoes$3K to the Town of Black Brook for repairs
Polk County has had 7 natural disasters declared by the President since 1953, most often severe storms, then floods. Not counted: the 2005 Hurricane Katrina evacuee emergency, which covered counties that took in evacuees.
Old photos of Black Brook after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the Black Brook archive →Black Brook and its neighbors
Black Brook is 2nd of the 5 graded towns here, from least expected damage per building to most. Tap a town to see its hazards.
| Town | Hazard risk | Mostly (buildings) | Flood claims |
|---|---|---|---|
| Clear Lake | Aless damage than 89% | river and rain flooding | — |
| Black Brook | A−less damage than 78% | river and rain flooding | 0 |
| Amery | A−less damage than 78% | river and rain flooding | — |
| Lincoln | B+less damage than 74% | river and rain flooding | — |
| Alden | Bless damage than 59% | river and rain flooding | — |
| Cylon | — | 690 residents; we grade 1,000+ | |
| Clear Lake | — | not graded yet | |
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 Black Brook 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.
- Pick your spot now: the lowest floor, an inside room, no windows.
- A watch means be ready; a warning means take cover now.
- Keep shoes and a flashlight by the bed.
- Park in a garage or under cover when storms are forecast.
- Stay away from windows while it falls.
- Photograph roof and car damage for your insurer.
- Trim dead limbs over the house and driveway.
- Tie down trash cans and outdoor furniture.
- Stay clear of downed lines and call the utility.
- 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 Black Brook
Is Black Brook at risk for natural disasters?
On FEMA’s National Risk Index, Black Brook has lower expected damage per building than 78% of U.S. towns: A− for hazard risk. Most of the expected damage is river and rain flooding (62%) and tornadoes (15%). This is FEMA’s model of an average year for today’s buildings, not a forecast.
Is Black Brook 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 Polk County, 10% of homes in mapped flood zones carry federal flood insurance, and 0.2% of all homes do.
How much is flood insurance in Black Brook?
FEMA’s Community Rating System list shows no discount for Black Brook’s flood program. Premiums depend on the building; policies usually start 30 days after you buy, so get a quote early.
What was the biggest storm in Black Brook?
By FEMA money that reached Black Brook, Flooding, Severe Storms and Tornadoes (2001): $3K to the Town of Black Brook for repairs.
Is Black Brook at risk from river and rain flooding?
It is the largest share of the building damage FEMA expects here (62%), and Black Brook’s rate for it is lower than 75% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in Black Brook.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Black Brook’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.