Flood Risk Community Explorer

High-risk block groups

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All 3 thresholds flagged

Avg % Structures in SFHA

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Selected community

Population in high-risk BGs

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High-risk block groups

Community Rating System

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Select a community

Overlay layers

LMI overlay

Renter overlay

Low NFIP take-up overlay

High-risk border

Block group labels

CRS Communities

Cross-hatched areas participate in FEMA's Community Rating System.

Risk thresholds

% Structures in SFHA ≥ 50%

0%100%

LMI population ≥ 40%

0%100%

Renter share ≥ 50%

0%100%

NFIP take-up (in SFHA) ≤ 40%

0%100%

A block group is high-risk when all 4 thresholds above are exceeded. Priority order when 3 of 4 are exceeded: % in SFHA > LMI > Renter % > NFIP take-up.

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Select a Community

Choose a community from the left panel to load its block group map and flood risk analysis.

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Block Group Spotlight

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Click a block group on the map