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The Florida Keys, Annapolis, Miami Beach, all of these communities have been dealing with

a big problem.

Water that comes in with the tides and doesn't leave.

Saltwater seeping up through storm drains and over the sea won't.

Another high tide is closing some streets and threatening businesses.

A shocking announcement today that some roads and homes may be surrendered to the sea.

And that's because in a lot of places climate change has resulted in higher sea levels.

And with the sea level, higher high tide is going to be higher.

So it's going to reach farther in land and it's going to flood areas that it didn't flood

before because it's riding on a higher sea.

That's climate scientist Astrid call this and she calls this chronic inundation.

You can think of it as the steady, ongoing creep of water into a community, primarily

from high tides as opposed to flooding from storms.

Chronic inundation is inundation of at least 10% of a community usable land.

At least 26 times per year.

Which is more or less the two highest tides of a month.

So it's when 10% of the community is underwater?

At least 10% so it can be 50% can be 70%.

And some communities are already seeing very high numbers of inundation.

And inundating some parts either by an inch or by a foot, it doesn't matter because things

get the deteriorating infrastructure starts to get affected.

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