Flood zone by address

FIRM (Flood Insurance Rate Map)

Official FEMA map showing flood-zone designations + base flood elevations for the 1% annual-chance flood for every US property.

BFE (Base Flood Elevation)

Elevation in feet above sea level that water reaches in a 1% annual-chance flood — the number that drives NFIP premium rating.

LOMA (Letter of Map Amendment)

Official FEMA decision removing a structure from a Special Flood Hazard Area when natural ground elevation is at or above BFE.

NFHL (National Flood Hazard Layer)

FEMA's authoritative GIS dataset combining all current FIRMs into a single nationwide flood-hazard layer.

Elevation Certificate (EC)

FEMA-mandated survey documenting a building's lowest-floor elevation relative to BFE — required for lowest NFIP premium tier.

NFIP (National Flood Insurance Program)

FEMA-administered federal flood-insurance program — only widely-available source of residential flood coverage in the US.

Post-FIRM (post-Flood-Insurance-Rate-Map)

Buildings constructed AFTER the community's first FIRM was issued — built to floodplain-compliant standards by code.

FEMA Map Service Center (MSC)

Authoritative FEMA portal for ordering parcel-level FIRM panels + flood-determination certificates + LOMA applications.

Schedule C (NFIP add-on coverage)

NFIP optional policy adding contents, basement, or building-code-upgrade coverage on top of standard policy.

WOTUS (Waters of the United States)

EPA + Army Corps of Engineers' definition of which water bodies fall under Clean Water Act jurisdiction — affects what counts as a regulated wetland on your parcel.

CSA (Conservation Soil Assessment) / NRCS Soil Survey

USDA Natural Resources Conservation Service's free per-parcel soil-type map — critical for septic design, foundation type, agricultural use, and erosion risk.

FEMA NFIP / IRMA / RiskRating 2.0

Federal flood-insurance program. Risk Rating 2.0 (Oct 2021+) priced policies on per-property risk (elevation, distance to water, rebuild cost) instead of FEMA flood zone alone.

LOMR (Letter of Map Revision)

FEMA's formal revision of a flood map after a physical change (levee, channel modification, fill, or new survey data) that affects the BFE or zone designation.

Flood zones explained — what AE, X, and VE actually mean

Plain-English guide to FEMA flood-zone codes (A, AE, AH, V, VE, X, X-shaded). What the 1% and 0.2% annual-chance zones mean for your property and your insurance.

Wildfire Hazard Potential — what the USFS scale means and how to defend your home

Plain-English guide to the USDA Forest Service's Wildfire Hazard Potential 1–5 scale, how to read your community's risk, and concrete home-defense measures.

Wildfire insurance in 2026 — why premiums spiked and what to do

California, Oregon, Colorado, and other Western states have seen wildfire insurance premiums double or homeowners drop entirely. Plain-English guide to the 2026 market.

FEMA flood zones — AE vs. X vs. VE in plain English

FEMA's National Flood Hazard Layer maps every US property's flood-zone designation. Here's what AE, X, VE, and AO actually mean for your insurance bill.

FEMA LOMA — when your home is wrongly in a flood zone (and how to appeal)

Letters of Map Amendment let homeowners appeal a wrong FEMA flood-zone designation. Here's the cost, timeline, and success rate.

Buying a house — the 12-dimension data checklist before you sign

Twelve federated public-records dimensions every US homebuyer should check before closing. Synthesized from EPA, FEMA, FBI, NCES, county assessors + recorders.

Zoning overlays — historic, flood, environmental layers that change what you can build

Base zoning codes (R-1, C-2, M-1) are only half the story. Special overlays — historic districts, floodplain, conservation, scenic — add a second rule layer. Here's what each one does.

Data staleness — when to re-check zipradar before making a decision

Federal data refreshes on different cadences. Here's when zipradar's snapshot is fresh enough for your decision and when you need to verify with the primary source.

USGS earthquake hazard maps — when separate earthquake insurance is worth it

USGS publishes a public earthquake-hazard map for every US county. Standard homeowners doesn't cover earthquake damage. Here's how to read the map + when to add coverage.

Base Flood Elevation (BFE) — the number that decides flood insurance

What FEMA Base Flood Elevation means, how it's measured, why an elevation certificate matters, and how 1 foot of difference can swing your annual flood premium $1,500+.

Tornado risk by region — wind zones, safe rooms, and roof rating

How FEMA wind-zone maps work, where Tornado Alley actually sits in 2026, ICC-500 safe-room standards, and which roof rating cuts insurance the most.

Hurricane evacuation zones and storm-surge maps — what the colors mean

Plain-English guide to hurricane evacuation zones (A, B, C, D, E + non-evac), how storm-surge maps differ from FEMA flood zones, and what your evac zone means for insurance.

Homeowners insurance by peril — what's covered, excluded, and surprise gaps in 2026

Standard HO-3 policies cover fire, theft, and most weather — but exclude flood, earthquake, sinkhole, and back-of-policy surprises. Plain-English guide to peril-by-peril coverage.

Hurricane + wind-rated construction — what 'fortified' actually means and which features cut insurance 20-50%

FORTIFIED Home + Miami-Dade approval + impact-rated windows reduce hurricane risk + insurance premiums 20-50% in coastal states. Plain-English buyer guide with cost-benefit.