Helena, MT Flood Zone Lookup
Last updated: March 2026
Helena faces flooding from Prickly Pear Creek, Tenmile Creek, and Last Chance Gulch. The city's mountain valley location channels floodwaters through the downtown area during heavy runoff events.
Lewis and Clark County has recorded 102 NFIP flood insurance claims since 1978, totaling $432K in payouts. Explore the full NFIP claims data by state and county to see how this area compares nationally.
FEMA Region
Region 8
NFIP Policies
223
Lewis and Clark County
Avg. Premium
$871/yr
Lewis and Clark County
FEMA Flood Risk Profile: Lewis and Clark County
Based on FEMA's National Risk Index, which evaluates flood risk at the county level using historical loss data, exposure, and vulnerability.
Inland Flood Risk
Relatively LowEst. annual loss: $12.4M
Source: FEMA National Risk Index, county-level assessment. Individual property risk may vary.
Federal Flood Disaster History: Lewis and Clark County
Lewis and Clark County has been included in 4 federal flood-related disaster declarations.
These declarations affected communities across Lewis and Clark County, including Helena.
Source: OpenFEMA Disaster Declarations Summaries API. Data sourced February 2026.
NFIP Flood Insurance Claims: Lewis and Clark County
Properties in Lewis and Clark County have filed 102 NFIP flood insurance claims totaling $432K in payouts since 1978. The average claim payout is $4K.
Highest-Claim Years
2018
38 claims - $176K
2011
17 claims - $94K
1981
14 claims - $113K
Claims by Flood Zone
Source: OpenFEMA NFIP Claims API. Data sourced March 2026. See national claims data.
Flood Insurance Coverage: Lewis and Clark County
Only roughly 1 in 126 households in Lewis and Clark County carries NFIP flood insurance (0.8% of estimated households). With 39 recorded flood events and $859K in damage, most flood losses in this county are likely uninsured.
Penetration Rate
0.8%
roughly 1 in 126 households
Historical Claims Ratio
1 in 2
102 claims over 45+ years across 223 current policies
Avg. Claim Payout
$4,235
Per claim, county-wide since 1978
Historically, Lewis and Clark County has averaged 1 claim for every 2 active policies (since 1978). This compares cumulative claims against today's policy count and does not predict future claim likelihood.
Coverage data: NFIP policies as of March 2026, claims since 1978 (March 2026), population from FEMA NRI. All figures are county-wide and include Helena.
What Your Flood Zone Means in Helena
Helena faces multiple inland flood threats, including riverine flooding from nearby waterways and flash flooding from intense rainfall overwhelming urban drainage systems. Properties near river corridors face the highest risk, but stormwater backup can affect neighborhoods well outside the mapped floodplain. The most common FEMA flood zone designations in Helena are Zone AE, Zone A, Zone X. FEMA's National Risk Index estimates the county's annual expected loss from inland flooding at over $12.4M.
With both riverine and urban stormwater flood risk, insurance costs in Helena depend heavily on a property's elevation relative to nearby waterways and the local drainage infrastructure. FEMA's Risk Rating 2.0 prices in multiple inland flood sources rather than relying on the flood zone line alone. If your property is in a Special Flood Hazard Area (SFHA) and you have a federally regulated or government-backed mortgage, federal law generally requires your lender to ensure you carry flood insurance.
Flood zone boundaries in Helena can shift when FEMA updates its Flood Insurance Studies or when upstream development changes how water moves through the watershed. New stormwater infrastructure or dam modifications can also trigger map revisions. Use our free lookup tool to check the current flood zone for any Helena address.
Repetitive Loss Properties: Lewis and Clark County
Lewis and Clark County has 5 properties with multiple flood insurance losses, including 0 severe repetitive loss properties. Severe repetitive loss is a subset of multiple loss, not a separate count. Data sourced March 2026.
Multiple Loss
5
2+ claims within 10 years
Severe Repetitive Loss
0
4+ claims or 2 exceeding value
Mitigated
0
Received FEMA mitigation
By Flood Zone
Source: OpenFEMA NFIP Multiple Loss Properties. Data sourced March 2026.
Recorded Flood Events: Lewis And Clark County
NOAA has recorded 39 flood events in Lewis And Clark County since 1996, causing $859K in damage.
Costliest Events
Events by Type
Source: NOAA Storm Events Database, 1996-2026. Data sourced March 2026.
Flood Mitigation: Lewis and Clark County
FEMA has funded mitigation for 45 properties in Lewis and Clark County, investing $339K in flood risk reduction. Common mitigation actions include acquisition (buying and demolishing flood-prone structures), elevation (raising buildings above flood level), and safe rooms (wind/storm shelters for tornado and hurricane protection).
By Action Type
Source: OpenFEMA Hazard Mitigation Assistance. Data sourced March 2026.
Helena, MT Flood Zone FAQ
What flood zones are in Helena, MT?
The most common FEMA flood zones in Helena are Zone AE, Zone A, Zone X. Properties in these high-risk zones (SFHA) may require flood insurance with a federally regulated or government-backed mortgage.
Is flood insurance required in Helena?
If your Helena property is in a Special Flood Hazard Area (SFHA) and you have a federally regulated or government-backed mortgage, federal law generally requires your lender to ensure you carry flood insurance. Properties in Zone X are not federally required to carry flood insurance, though coverage is still recommended since over 40% of all NFIP flood claims come from Zone X properties.
How do I check my flood zone in Helena?
Enter your Helena address in the search tool above for an instant flood zone determination. Results include your FEMA flood zone, SFHA status, base flood elevation (if available), and FIRM panel information, pulled directly from FEMA's National Flood Hazard Layer.
What type of flooding affects Helena?
Helena is primarily affected by river overflow combined with urban drainage challenges. The most common FEMA flood zone designations are Zone AE, Zone A, Zone X. Use the free lookup tool above to check the specific flood zone for any Helena address.
Has Helena experienced major flooding events?
Lewis and Clark County, where Helena is located, has been part of 4 federal disaster declarations for flooding, hurricanes, or severe storms. The most recent was Flooding in 2018. Federal disaster declarations are issued when flooding overwhelms local resources and triggers FEMA assistance programs.
How many flood insurance claims have been filed in Helena?
Lewis and Clark County has recorded 102 NFIP flood insurance claims totaling $432K in payouts since 1978. The year with the most claims was 2018, with 38 claims and $176K in payouts. These figures cover all NFIP claims in the county, including Helena.
How many flood insurance policies are active in Helena?
Lewis and Clark County currently has 223 active NFIP flood insurance policies with an average annual premium of $871. The most policies are in Zone X (65 policies). These figures cover all active NFIP policies in the county.
How many Helena properties have flooded repeatedly?
Lewis and Clark County has 5 properties with multiple flood losses on record, including 0 severe repetitive loss properties. These are properties that have experienced four or more NFIP claims of $5,000+ or two claims exceeding the building value.
Can my Helena property be removed from a high-risk flood zone?
Yes, if your property's natural ground elevation is above the Base Flood Elevation and FEMA inadvertently mapped it in a high-risk zone, you can apply for a Letter of Map Amendment (LOMA). A successful LOMA removes the property from the Special Flood Hazard Area, generally eliminating the federal mandatory flood insurance requirement. You will need an elevation certificate from a licensed surveyor. If a property was raised above the BFE with fill material, the process is a LOMR-F rather than a LOMA.
What is Base Flood Elevation in Helena?
Base Flood Elevation (BFE) is the predicted height of floodwaters during a 1% annual chance (100-year) flood, shown on FEMA maps as an elevation number in feet above sea level. In Helena's Zone AE areas, BFE lines appear on the FIRM as wavy contours labeled with elevation values. Properties with a lowest floor at or above the BFE typically qualify for significantly lower NFIP flood insurance premiums.
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Look Up Any Helena, MT Address
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Disclaimer: Flood risk data on this page is sourced from FEMA datasets including the National Risk Index, NFIP claims and policy records, disaster declarations, and the Community Rating System. These datasets were last extracted on March 2026 and may not reflect the most recent changes. This page is for informational purposes only and is not a certified flood zone determination. Always verify current flood zone status through FEMA or a licensed determination provider before making property, insurance, or lending decisions.