Concord · Photo: Historic American Buildings Survey / Historic American Engineering Record · Public domainFEMA expects less hazard damage per building in Walker Mill than almost anywhere in the U.S., mostly from river and rain flooding
On FEMA’s National Risk Index, Walker Mill gets an A+ for hazard risk: among the lowest expected damage per building of U.S. towns, #33 of 261 in Maryland. Most of that expected damage is river and rain flooding (67%), then hurricanes (15%). Flood insurance has paid 5 claims here since 1984.
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 Walker Mill 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
Hurricanes
Earthquakes
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 Walker Mill’s grade
River and rain flooding is 67% of the building damage FEMA expects in Walker Mill, and Walker Mill’s rate of river and rain flooding damage is lower than 95% of U.S. census tracts. Next is hurricanes at 15% (higher than 72% of U.S. census tracts).
A+ #33 of 261 in Maryland; among the lowest expected damage per building of U.S. towns (21,298).
Walker Mill’s residents live in 6 census tracts; FEMA’s figures are combined by where they live.
The typical Maryland town has lower expected damage than 97% of U.S. towns; within the state, Walker Mill has less expected damage per building than 88% of Maryland towns.
In dollars, FEMA expects about $1.2M a year in losses across Walker Mill: $798K to buildings, the rest to people and crops.
Does Walker Mill flood? Rarely: 5 flood claims since 1984
Every paid claim on a federal flood insurance policy in Walker Mill, from FEMA’s records: 1.0 per 1,000 homes, fewer than 78% of the 13,809 U.S. towns with a flood insurance record.
- Hurricane Irene1 claim · $2K
Walker Mill isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Prince George's County.The storms Walker Mill remembers
None of the 15 disasters declared for Prince George's County shows FEMA aid or repair money reaching Walker Mill itself in FEMA’s records, so these are its biggest flood-claim years.
- 20112 flood claims paidThe year of Remnants of Tropical Storm Lee, declared for Prince George's County
- 19841 flood claims paidNo declaration for the county that year
- 20061 flood claims paidNo declaration for the county that year
Prince George's County has had 15 natural disasters declared by the President since 1953, most often winter storms, then floods. Not counted: the 2005 Hurricane Katrina evacuee emergency, which covered counties that took in evacuees.
Old photos of Walker Mill after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the Walker Mill archive →Walker Mill and its neighbors
Walker Mill is 3rd of the 6 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 |
|---|---|---|---|
| Forestville | A+among the lowest damage | river and rain flooding | 6 |
| Capitol Heights | A+among the lowest damage | river and rain flooding | 6 |
| Walker Mill | A+among the lowest damage | river and rain flooding | 5 |
| District Heights | A+less damage than 98% | river and rain flooding | 4 |
| Coral Hills | A+less damage than 98% | river and rain flooding | 2 |
| Seat Pleasant | A+less damage than 96% | river and rain flooding | 3 |
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 Walker Mill 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.
- 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.
- Drop, cover and hold on.
- Strap tall furniture and the water heater to the wall.
- Know how to shut off the gas.
- 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 Walker Mill
Is Walker Mill at risk for natural disasters?
On FEMA’s National Risk Index, Walker Mill has among the lowest expected damage per building of U.S. towns: A+ for hazard risk, #33 of 261 in Maryland. Most of the expected damage is river and rain flooding (67%) and hurricanes (15%). This is FEMA’s model of an average year for today’s buildings, not a forecast.
Does Walker Mill flood?
Flood insurance has paid 5 claims in Walker Mill since 1984, $71K in all, or 1.0 per 1,000 homes, fewer than 78% of U.S. towns with a flood insurance record. The most claims came from Hurricane Irene (1).
Is Walker Mill 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 Prince George's County, 0.9% of all homes carry federal flood insurance.
How much is flood insurance in Walker Mill?
FEMA’s Community Rating System list shows no discount for Walker Mill’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 Walker Mill?
By flood claims, Hurricane Irene: 1 paid, $2K.
Is Walker Mill at risk from river and rain flooding?
It is the largest share of the building damage FEMA expects here (67%), and Walker Mill’s rate for it is lower than 95% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in Walker Mill.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Walker Mill’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.