More people are moving out of flood-prone areas than are moving in.Last year, counties with high flood risk had a net loss of over 60,000 residents, more than double the year before, according to a recent analysis from Redfin. Counties with low flood risk had a net gain of about 70,000 residents.Miami-Dade County, Florida lost more residents last year than any other flood-prone county. Harris County, Texas (which includes Houston) was not far behind. In both areas, about a third of homes are considered high-risk for flooding.“I think the real reason people are moving out, though, is because of affordability,” said Daryl Fairweather, chief economist at Redfin. Fairweather said there is increasingly a link between the two.“Climate risk makes things less affordable,” she said.In places that are prone to flooding or hurricanes, homeowners insurance is going up — often by a lot. If you’re in an actual flood zone, you’ll also have to buy flood insurance. Then, there’s the potential cost of having to repair your home if it gets damaged.Jeremy Porter, chief economist at the nonprofit First Street, said these days, people have a lot more access to data about a home’s climate risks before they buy.“They are making the connection, oftentimes, between ‘this is a high risk flood area, there's probably going to be higher rates of insurance,’ and ‘that's going to make my monthly cost of my mortgage more expensive,’” Porter said.A study published in the National Bureau of Economic Research found that when people see data about climate risks in advance, they’re more likely to choose a home with lower risk.“What I've really seen over the last ten years is this huge growth in awareness,” Porter said.And — more recently — a corresponding change in where people are choosing to live.