Natural hazards · Adelphi

Adelphi, MD natural hazards

Most of the natural-hazard damage FEMA expects in Adelphi comes from inland flooding, and overall the risk is very low for a U.S. community. Flood insurance has paid 2 claims here since 2011. 1 federal disaster brought FEMA money into town.

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

Expected damage

How exposed is Adelphi?

Very low

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Adelphi to be higher than in 6% of U.S. communities, mostly from inland flooding and heat waves.

Inland flooding43%Heat waves16%Tornadoes13%Hurricanes7%Earthquakes5%Everything else15%

By hazard

What Adelphi faces

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

Inland flooding

43% of expected damage

Well below average · higher than 15% of U.S. places

Recorded about 4 times a year in the area

Heat waves

16% of expected damage

Well below average · higher than 4% of U.S. places

Recorded about 6 times a year in the area

Tornadoes

13% of expected damage

Below average · higher than 33% of U.S. places

Hurricanes

7% of expected damage

Above average · higher than 72% of U.S. places

Recorded about once every 11 years in the area

Earthquakes

5% of expected damage

Below average · higher than 43% of U.S. places

Lower here

HailIce stormsWinter weatherCold wavesWildfireLandslidesStrong windLightning

Not a risk here

Coastal floodingDroughtAvalanchesTsunamisVolcanic 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 Adelphi flood?

Every paid claim on a federal flood insurance policy in Adelphi, from FEMA’s records.

2paid claims since 2011

$13Kpaid to owners

0homes flooded more than once

20112026

of all homes
are insured

No community discount. Adelphi 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.

Disasters that hit Adelphi

1 federal disaster brought FEMA money here

Disasters the President declared that paid out in Adelphi itself: aid to households, or repair grants to Adelphi.

Brought FEMA money into AdelphiDeclared for Prince George's County only

2003

Hurricane Isabel

7 households applied for aid $6K aid approved

Prince George's County has had 16 natural disasters declared since 1953, most often winter storms and hurricanes.

Around Adelphi

Adelphi and the towns around it

Very lowLowModerateHighVery high

Chillummostly inland floodingLow

Hyattsvillemostly inland floodingLow

Langley Parkmostly inland floodingLow

Hillandalemostly inland floodingVery low

University Parkmostly inland floodingVery low

Silver Springmostly inland floodingVery low

Adelphimostly inland floodingVery low

College Parkmostly 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. Adelphi covers 4 census tracts, combined by population.

Money that reached townFlood claims are matched to Adelphi’s own flood-insurance community (here, the census tracts inside it); household aid to the registrant’s city; repair grants to Adelphi. FEMA’s model follows property values, so a place that recently lost many homes can rate lower than it feels.

FEMA’s expected losses across Adelphi total about $1.2M a year, counting buildings, people and crops.

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.