Climate change means more mosquito days, increasing Zika risk.

Delaware currently has an average of 10 dangerous heat days a year. By 2050, it is projected to see this increase five-fold to 50 such days a year.

More than 20,000 people living in Delaware are especially vulnerable to extreme heat.

As the planet continues to warm from the increase in greenhouse gases in the atmosphere, the temperatures that we consider to be normal are also rising.

Delaware ties with Arizona as the fourth-fastest warming state in the nation, based on annual temperature trends since 1970.

In Delaware, there are nearly 29,000 people living in areas that are at an elevated risk of inland flooding.

To determine the future inland flood threat, we examined the frequency of high water runoff that could lead to flooding threats both currently and in the future.

3.1 million gallons of sewage spilled in Delaware from Hurricane Sandy.

Climate change causing more nuisance flooding in Delaware

Atlantic hurricane season is seeing more major storms

Today, Delaware has 22,000 people at risk of coastal flooding. By 2050, an additional 9,000 people are projected to be at risk due to sea level rise.

U.S. Cities We Could Lose to the Sea

A greater proportion of Delaware’s land area is at risk of coastal flooding than any of the lower 48 states except Florida and Louisiana. Approximately 5.4 percent, or 100 square miles, of Delaware’s land is currently within the 100-year coastal floodplain. By 2050, this is projected to increase to 7.1 percent or 130 square miles due to sea level rise.

Sea level threats down to zip code

Type a coastal place name in Delaware and find local projections, maps and potential impacts on people, infrastructure, and much more with our interactive tool.

Since 1950, human-caused global sea level rise has tipped the balance to account for two-thirds of coastal flood days in the U.S., according to our latest sea level rise analysis.

What's Happening in Your Region?

New York

Sandy’s Surge Was Extreme. It Could Become Normal

The risk posed by future storms like Sandy is only going to increase due to climate change. The potential for stronger storms and rising seas mean Sandy-level flooding could could occur once every 23 years as opposed to once every 400... More

When it Rains it Pours, and Sewage Hits the Fan

Increasing heavy downpours, fueled by climate change, cause millions of gallons of sewage overflows nationwide.... More

Study Reveals Stunning Acceleration of Sea Level Rise

A new study has charted what they called an “acceleration” in sea level rise that’s triggering and worsening flooding in coastlines around the U.S.... More


Sea Level Rise Could Help Marshes Ease Flooding

Newly published modeling shows that a looming acceleration in sea level rise could further accelerate the spread of marshes worldwide... More

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