As Hurricane Laura bears down on the Gulf Coast, residents are preparing for what could be a historic storm surge.

The potential for widespread flooding is high, but even after major storms like Hurricane Harvey in 2017, some homeowners in high-risk areas still do not have flood insurance.

Starting this week, however, every homeowner and potential homebuyer in America will be able to see a new, forward-looking analysis of their property’s flood risk. That could have a huge impact on the national housing market.

A nonprofit research and technology group, First Street Foundation launched an interactive website offering flood risk data on more than 142 million homes and properties across the country in June.

Now Realtor.com, one of the nation’s largest home listing sites, will put those scores on all of its listings.