Climate Risk Summary

Lewiston, ME Risk Profile

The primary drivers of climate-related financial risk in Lewiston, ME are Inland Flooding, Hurricane, and Ice Storm. This area also faces an unusually high intensity for Winter Weather compared to national averages.

City-Wide Aggregation

These scores represent the population-weighted average across all residential blocks in Lewiston.

Primary Risks

Inland Flooding

$3,117,151

Expected Annual Loss for Lewiston

16.4Score

Relatively Low compared to US average

Lewiston
Minimal Estimated LossMax Estimated Loss

Hurricane

$1,585,543

Expected Annual Loss for Lewiston

79.0Score

Relatively Moderate compared to US average

Lewiston
Minimal Estimated LossMax Estimated Loss

Ice Storm

$613,697

Expected Annual Loss for Lewiston

92.5Score

Relatively High compared to US average

Lewiston
Minimal Estimated LossMax Estimated Loss

City Boundary

Legend
Very Low
Low
Moderate
High
Very High
Extreme

Financial Risk Inventory

MAJOR DRIVER
Inland Flooding
$3,117,151
Score: 16.4
MAJOR DRIVER
Hurricane
$1,585,543
Score: 79.0
MAJOR DRIVER
Ice Storm
$613,697
Score: 92.5
Earthquake
$572,227
Score: 54.1
UNUSUALLY HIGH
Winter Weather
$326,030
Score: 94.6
Cold Wave
$234,249
Score: 31.3
Strong Wind
$179,836
Score: 46.9
Lightning
$180,655
Score: 58.2
Hail
$131,616
Score: 56.8
Tornado
$85,097
Score: 17.4
Heat Wave
$66,720
Score: 7.1
Drought
$81,002
Score: 6.8
Wildfire
$2,162
Score: 42.8
Landslide
$113
Score: 45.7

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

🌀High Investment

Hurricane Mitigation

Install permanent hurricane shutters or upgrade to impact-resistant windows.

Risk Score: 79.0
❄️Medium Investment

Ice Storm Mitigation

Install a 10kWh backup battery system to keep pipes from freezing during grid failure.

Risk Score: 92.5
🏠Low Investment

Earthquake Mitigation

General property maintenance and insurance review recommended.

Risk Score: 54.1
🏠Low Investment

Winter Weather Mitigation

General property maintenance and insurance review recommended.

Risk Score: 94.6
🏠Low Investment

Lightning Mitigation

General property maintenance and insurance review recommended.

Risk Score: 58.2
🧊Medium Investment

Hail Mitigation

Replace roof with Class 4 impact-resistant shingles to significantly lower insurance premiums.

Risk Score: 56.8

Sources and Methodology

Spatial Aggregation

Our "Atlas" risk scores are derived using a population-weighted spatial join. Because US Zip Codes and Census Tracts do not share perfectly aligned boundaries, a simple geographic average would be misleading. We utilize US Census Block Group population statistics to identify where residents actually live within a Zip Code. We then intersect these points with FEMA National Risk Index (NRI) hazard data to calculate a weighted exposure score.

Financial Projections (EAL)

Expected Annual Loss (EAL) estimates the average economic impact of natural hazards in dollars per year. This calculation incorporates three components: Exposure (the value of structures and agriculture), Annualized Frequency (historical probability), and Historic Loss Ratio (vulnerability of the area).

Primary Data Sources

  • FEMA National Risk IndexHazard frequency and loss data (v1.20.0)
  • U.S. Census BureauTIGER/Line 2025 Shapefiles & Decennial Population

Nearby Cities

AuburnBrunswickFreeportLisbonLisbon Falls

Zip Codes in Lewiston

04240