Just tried it....I'm not very convinced in it's modeling.

I live near the top of a large, steeply sloped hill and water does not flow past/towards the house. It claims there is a 97% chance of a foot or more of water reaching my house in the next 30 years. It at least doesn't claim there would be damages, but there's really no way for what it claims to actually occur.

The FEMA maps also have reliability problems but I'm not sure this is more reliable.