Photo: IFCAR · Public domainStorms, floods and disasters in Upper Marlboro
Upper Marlboro isn’t graded for hazard risk: Upper Marlboro has 683 residents; we grade towns of 1,000 or more.
What Upper Marlboro 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
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 Upper Marlboro flood? No paid flood claims on record
FEMA’s records show no paid flood insurance claims in Upper Marlboro. That’s not a promise: most homes don’t carry flood insurance, so small floods go unrecorded.
Upper Marlboro 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.3 federal disasters brought FEMA money to Upper Marlboro
Disasters that paid out in Upper Marlboro itself (aid to households or repair grants to the Town of Upper Marlboro), newest first, with that year’s flood claims.
- 2016Severe Winter Storm and Snowstorm$7K to the Town of Upper Marlboro for repairs
- 2010Severe Winter Storms and Snowstorms$2K to the Town of Upper Marlboro for repairs
- 2003Hurricane Isabel242 households applied for aid$139K aid approved
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 Upper Marlboro after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the Upper Marlboro archive →Upper Marlboro 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 |
|---|---|---|---|
| Marlboro Meadows | A+among the lowest damage | river and rain flooding | 1 |
| Queensland | A+less damage than 98% | river and rain flooding | 2 |
| Westphalia | A+less damage than 98% | river and rain flooding | 4 |
| Brock Hall | A+less damage than 96% | river and rain flooding | 19 |
| Marlboro Village | Aless damage than 90% | river and rain flooding | 5 |
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 Upper Marlboro 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.
- 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 Upper Marlboro
Is Upper Marlboro 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 Upper Marlboro?
FEMA’s Community Rating System list shows no discount for Upper Marlboro’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 Upper Marlboro?
By FEMA money that reached Upper Marlboro, Hurricane Isabel (2003): 242 households applied for aid, $139K approved.
Storm stories
Memories, warnings and help from neighbors in Upper Marlboro.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Upper Marlboro’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.