Philadelphia, PA

Top Climate Change Risks:

Precipitation, Heat, Drought

Risk Snapshot

Climate Change Hazard Ratings for Philadelphia, PA

Ratings represent risk relative to the continuous United States. 100 is the highest risk for the hazard and 1 is the lowest for the U.S., but does not indicate no risk. Flood and fire are rated based on the buildings in Philadelphia exposed to these hazards. See hazard sections below and check your address for details.

People in Philadelphia, PA are especially likely to experience increased risks from precipitation, heat, and drought.

Precipitation risk in Philadelphia, PA is extreme. Heat risk is very high. Drought risk is significant. About 19% of buildings in Philadelphia, PA are at risk of flooding, and the risk level for these buildings is significant. About 4% of buildings in Philadelphia, PA are at risk of wildfire, and the risk level for these buildings is relatively low.

Fire and flood risk can vary significantly for individual properties within a city. Check your address for detailed heat, storm, fire, drought, and flood risk through 2050.

Precipitation risk in Philadelphia, PA

The amount of precipitation during the most extreme days in Philadelphia is projected to increase.

An extreme storm for Philadelphia, PA is a 48-hour rainfall total greater than 1.0 inches. Historically, about 18.3" of rain (or the equivalent in snow) fell over about 11 storms each year. By 2050, about 22.2" of rain are projected over about 13 storms each year. The annual precipitation in Philadelphia, PA is projected to increase from about 45.7" to about 49.5".

Extreme precipitation in any form can pose significant risks. Climate change increases the potential for extreme rainfall or snowfall because warmer air can hold more water vapor. See more information on storm risk. Property owners can take steps to reduce their risks from extreme precipitation.

Heat risk in Philadelphia, PA

The number of the hottest days in Philadelphia is projected to keep increasing.

In a typical year between 1985-2005, people in Philadelphia, PA experienced about 7 days above 93.6ºF in a year. By 2050, people in Philadelphia are projected to experience an average of about 36 days per year over 93.6ºF.

Climate change is increasing the frequency and intensity of heat waves, even in places with cooler average temperatures. See more information on heat risk. Everyone can take steps to reduce their risks from extreme heat.

Drought risk in Philadelphia, PA

The recent average water stress in Philadelphia is moderately low and projected to remain about the same through 2050.

The Schuylkill watershed, which contains Philadelphia, PA, has experienced 399 weeks (35% of weeks) since 2000 with some of its area in drought of any level, and 17 weeks (1% of weeks) since 2000 with some of its area in Extreme or Exceptional drought. Source: National Drought Monitor.

Climate change is increasing the risk of drought. Water stress (the ratio of water demand to supply) depends on how water utilities source water and their plans to adapt to climate change. Property owners can also take steps to reduce their risks from drought.

Flood risk in Philadelphia, PA

Buildings at risk in Philadelphia average about a 27% chance of a flood about 1.2 feet deep over 30 years.

Of 542 census tracts in Philadelphia, PA, there are 42 where more than half of buildings have significant risk from storm surge, high tide flooding, surface (pluvial) flooding, and riverine (fluvial) flooding.Property owners can check a specific address for flood risk including FEMA flood zone, then take steps to reduce their vulnerability to flooding damage.

Climate change is increasing inland and coastal flooding risk due to sea level rise and increasing chances of extreme precipitation. See more information on flooding risk.

Fire risk in Philadelphia, PA

The risk on the most dangerous fire weather days in Philadelphia is low. The number of these days per year is expected to increase through 2050.

Of 542 census tracts in Philadelphia, PA, there are 77 where more than a quarter of buildings have significant fire risk, and 33 where more than half of buildings have significant fire risk. Property owners can take steps to mitigate their risks from wildfires.

Fire risk depends on proximity to vegation: densely developed urban areas have a much lower risk of burning than areas adjacent to wildland. Climate change increases risks from wildfire by creating hotter, drier conditions for fires to spread. ClimateCheck ratings of fire risk are based on projected weather conditions and U.S. Forest Service models simulating fire behavior.

How can we prevent and adapt to climate change?

Mitigating climate change, by eliminating our emissions into the atmosphere and reducing our strain on the environment, and adapting to our changing planet are both vital to our well-being.

Understand Risks

The risks presented on this page reflect averages for Philadelphia, PA and can vary for individual properties. Check your address and request a report describing risks to your property and in your area.

Protect Homes and Communities

Check our free report for tips on protecting your home from hazards.

Green infrastructure is a category of nature-based solutions for managing increasing precipitation. Find resources for individuals and municipalities through the EPA Soak Up the Rain initiative.

Planting trees and vegetation helps reduce extreme heat in urban environments. Cool pavements can also help. Search the Heat Island Community Actions Database to see what some municipalities have been doing to reduce extreme heat risk.

Read more about building resilience for communities: U.S. Climate Resilience Toolkit

Use the Common Cause tool to find your representatives, how to contact them, and information about political contributions and bills they have introduced.

Find Balance

Reducing emissions is necessary and possible across the globe and in every part of our society. Learn more with the Project Drawdown introduction to climate solutions.

Estimate your emissions with the CoolClimate calculator.