Natural hazards · Alta

Alta, IA natural hazards

Most of the natural-hazard damage FEMA expects in Alta comes from inland flooding, and overall the risk is low for a U.S. community. 4 federal disasters brought FEMA money into town.

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

Expected damage

How exposed is Alta?

Low

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Alta to be higher than in 28% of U.S. communities, mostly from inland flooding and tornadoes.

Inland flooding28%Tornadoes26%Hail16%Cold waves13%Drought8%Strong wind7%Everything else4%

By hazard

What Alta faces

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

Inland flooding

28% of expected damage

Well below average · higher than 21% of U.S. places

Recorded about 2 times a year in the area

Tornadoes

26% of expected damage

Well above average · among the top 1% of U.S. places

Recorded about once every 9 years in the area

Hail

16% of expected damage

Well above average · higher than 76% of U.S. places

Recorded about 5 times a year in the area

Cold waves

13% of expected damage

Above average · higher than 74% of U.S. places

Recorded about 9 times a year in the area

Drought

8% of expected damage

Recorded about 16 times a year in the area

Strong wind

7% of expected damage

Well above average · higher than 92% of U.S. places

Recorded about 4 times a year in the area

Lower here

Ice stormsWinter weatherHeat wavesWildfireEarthquakesLandslidesLightning

Not a risk here

Coastal floodingHurricanesAvalanchesTsunamisVolcanic 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 Alta flood?

FEMA's records show no paid flood insurance claims in Alta.

of all homes
are insured

No community discount. Alta isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.

Insurance rates: Buena Vista County.

What’s been done with FEMA grants

1storm safe rooms built

Disasters that hit Alta

4 federal disasters brought FEMA money here

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

Brought FEMA money into AltaDeclared for Buena Vista County only

2024

Severe Storms, Flooding, Straight-Line Winds, and Tornadoes

2 households applied for aid

2013

Severe Storms, Tornadoes, and Flooding

$6K to the City of Alta for repairs

2009

Severe Winter Storms and Snowstorm

$7K to the City of Alta for repairs

2007

Snow

$4K to the City of Alta for repairs

Buena Vista County has had 20 natural disasters declared since 1953, most often severe storms and floods.

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. Alta is smaller than a census tract, so it shares the figures of the tract around its center.

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

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.