As coastal cities deal with the impact of climate change and rising sea levels, we examine how extreme flooding is changing the way architects are building homes in these at-risk areas. As part of our series, “Earth, We’re On It,” our correspondent Jessica Gomez traveled to Charleston, SC where some homeowners are already forced to spend $400,000 dollars to raise their historic homes. Plus, what do you do if you can’t afford that hefty price tag?

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