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Washington - Baltimore - Philadelphia - Sea Level Rise Map

Use the window in the top left of the map frame to change the amount of sea level rise.

The map above shows areas near Washington, D.C., Baltimore, Philadelphia and Chesapeake Bay that will be inundated with various levels of sea level rise. You can select a value of sea level rise using the dropdown box in the upper left corner of the map. The navigation buttons can be used to zoom in/out and pan across the map.

The map clearly shows that a sea level rise of only five meters will inundate thousands of acres in Maryland, Delaware, New Jersey and Virginia. The coastal areas of Chesapeake Bay and Delaware Bay will lose a lot of valuable real estate. If you zoom in on Baltimore, Washington, D.C., Philadelphia, Atlantic City, Ocean City, or Annapolis you will see that important portions of these cities will also be lost.

This map is not a carefully surveyed and extremely accurate presentation. It is intended to provide a visual impression of which geographic areas might be flooded if global warming and climate change continue unabated.

Elevations in urban areas shown on the map may be higher than actual values due to radar reflections from the tops of buildings and other structures. This would result in flooding being more severe than shown on this map. For an interesting presentation of how sea level rise might impact important cities, see U.S. Cities We Could Lose to the Sea at Climate

This sea level rise map was created by Alex Tingle of using the Google Maps API, NASA data and lots of programming savvy. He explains how the map was created, the sea level data and issues about map accuracy here. He also provides an impressive, full-monitor, global sea-level rise map on his website. We thank Alex for allowing us to share this map on Also thanks to Google and NASA for providing the resources needed to make this map.

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