Chattanooga, TN (37402) Flooding & Climate Risk Profile

The primary drivers of climate-related financial risk in Chattanooga, TN (37402) are Inland Flooding, Earthquake, and Tornado.

Understanding the Dollars

Expected Annual Loss (EAL) is a statistical average of property damage for this entire zip code over a standard year across all properties.

/ It represents the "average cost" rather than a guaranteed yearly bill.
/ It can be used to compare the relative risk from different hazards and across different neighborhoods.

Zip Code Risk Map

Flood Plain Analysis

Significant Flood Exposure in 37402

FEMA Flood Maps for 37402 identify the "100-year" and "500-year" floodplains (1% and 0.2% annual chance), but modern climate risk analysis suggests that nearly 25% of flood insurance claims originate from properties outside of these designated high-risk zones.

Use the map above to better understand risk by looking at both the FEMA flood plain maps and FEMA Risk Inventory maps by census tract. Standard FEMA maps may not account for 'flash flooding' from intense rain events.

FEMA Designation vs. Reality

Very High

Relative Vulnerability

$4,144,444

Annualized Property Exposure

Primary Risks

Inland Flooding

$4,144,444

Expected Annual Loss for Zip Code 37402

94.5Score

Very High compared to US average

Earthquake

$1,036,318

Expected Annual Loss for Zip Code 37402

85.3Score

Relatively Moderate compared to US average

Tornado

$695,997

Expected Annual Loss for Zip Code 37402

88.7Score

Very High compared to US average

Financial Risk Inventory

MAJOR DRIVER

Inland Flooding

$4,144,444

Score: 94.5

MAJOR DRIVER

Earthquake

$1,036,318

Score: 85.3

MAJOR DRIVER

Tornado

$695,997

Score: 88.7

Strong Wind

$78,280

Score: 74.3

Cold Wave

$69,968

Score: 45.2

Hail

$32,529

Score: 64.5

Lightning

$30,836

Score: 62.2

Ice Storm

$22,106

Score: 70.3

Winter Weather

$17,051

Score: 77.8

Heat Wave

$16,945

Score: 15.1

Hurricane

$7,704

Score: 44.7

Wildfire

$30

Score: 26.1

Landslide

$26

Score: 65.2

Recommended Mitigation Strategies

Recommended investments to protect your property value and reduce insurance liability based on your local risk profile.

💧Medium Investment

Inland Flooding Mitigation

Install a smart sump pump with battery backup and extend downspouts 10ft from foundation.

Risk Score: 94.5

🏠Low Investment

Earthquake Mitigation

General property maintenance and insurance review recommended.

Risk Score: 85.3

🌪️High Investment

Tornado Mitigation

Reinforce garage doors and consider a FEMA-approved safe room or storm cellar.

Risk Score: 88.7

Methodology and Sources

Spatial Climate Risk Modeling

The Expected Annual Loss (EAL) and hazard risk scores are derived from the FEMA NRI zip code dataset using a population-weighted spatial join. Because Zip Codes and Census Tracts do not share perfectly aligned boundaries, we utilize US Census Block Group population centroids to identify where residents actually live.

Financial & Insurance Metrics

The pysical resilence score is calculated by synthesizing Expected Annual Loss (EAL) against the total building replacement value within a jurisdiction. This creates a "Loss Ratio" that measures physical resilience. We supplement this with ZIP-code level data from the U.S. Treasury's Federal Insurance Office (FIO), monitoring trends in premium growth, loss ratios, and policy non-renewals to identify emerging "Insurance Deserts."

Primary Data Sources

FEMA National Flood Hazard LayerHigh-resolution vector data for 100-year and 500-year flood zones.
U.S. Department of the TreasuryFIO ZIP-code level insurance data (2018–2022 Historical Set).
FEMA National Risk IndexBaseline hazard frequency and economic loss data (v1.20.0).
U.S. Census BureauTIGER/Line 2025 Shapefiles & Decennial Population Statistics.

Nearby Locations

Zip Code 37408 Zip Code 37403 Zip Code 37405 Zip Code 37404 Zip Code 37410