Natural Disaster Risk in Philadelphia
Pennsylvania
Risk Summary for Philadelphia
Philadelphia scores 8.1/10 (Very High risk), above the U.S. average of 4.5. The leading hazard is Cold Wave.
Top Hazards
All 18 Hazard Scores
How it compares
Live Conditions
🏠 What this means for insurance
High-risk area — review your coverage carefully
Properties in very high-risk areas often require specialized coverage that standard homeowners policies do not include. Consider flood insurance through the NFIP, wildfire-specific endorsements, or earthquake riders depending on your top hazards. Premiums in these areas can be significantly higher than average.
This is general information only. Consult a licensed insurance professional for advice specific to your property.
Natural Hazard Profile: Philadelphia, Pennsylvania
Philadelphia, in Philadelphia County, is a city of 71,004 residents situated along the northeastern Atlantic Seaboard. Its humid continental climate brings cold winters, warm summers, and four distinct seasons, and in particular nor'easter exposure and spring river flooding. These conditions collectively define the natural hazard environment that Philadelphia residents and property owners must navigate.
According to FEMA's National Risk Index, Philadelphia carries an overall risk score of 8.1/10, placing it in the very high category. Arctic air outbreaks are the leading natural hazard, with temperature plunges to dangerous lows capable of causing hypothermia and widespread infrastructure failures. The area also faces notable exposure to heat and winter.
Within Pennsylvania, Philadelphia's risk is, considerably above the 5.9/10 state average. Nationally, it ranks well above the U.S. national average of 4.5/10. FEMA's analysis of Philadelphia County identifies cold wave as the foremost hazard, followed by heat and winter. These rankings reflect the relative frequency and severity of each hazard type in the local environment.
Given Philadelphia's very high risk classification, residents should treat disaster preparedness as a year-round priority. This means maintaining updated homeowners and flood insurance, building a 72-hour emergency kit, knowing the evacuation routes for the primary hazards, and signing up for local emergency alert systems.
What this means for Philadelphia: Cold Wave preparedness
- Dress in layers and limit exposure during extreme cold to prevent frostbite and hypothermia.
- Protect pipes, pets, and plants, and ensure heating systems are serviced before winter.
- Keep emergency heat and supplies ready in case of cold-related power outages.
Local Factors for Philadelphia
These city-level factors differentiate Philadelphia from other communities in Philadelphia County and provide geographic context for its hazard exposure.
Population
71,004
UrbanGeographic Zone
Atlantic Coast
Hurricane, nor'easter & coastal flood risk
Climate Band
Moderate Continental
Latitude 40.0°
Flood Terrain
Minimal — county topography limits flood risk
Flood score: 1.0/10
Wildfire Exposure
Lower — moist climate limits wildfire frequency
Fire score: 3.8/10
Coordinates
40.0173° N, 75.0939° W
Philadelphia County
Population and coordinates from SimpleMaps US Cities data. Hazard scores from FEMA National Risk Index. Geographic classification derived from coordinates.
Recent Climate Data for Philadelphia
Last 12 months · Source: Open-Meteo archive
Notable Weather Days (last 12 months)
ZIP Codes in Philadelphia
Other cities in Pennsylvania
Data source: FEMA National Risk Index (NRI). Scores normalized to 1–10 across all US counties. City scores inherit county-level FEMA data. For informational purposes only.