If you live in a 1-percent AEP (100-year) flood zone, writes USGS, the odds of being flooded at least once over a 30-year mortgage are 26%. That's about a 1 in 4 chance.

The term "100-year flood" is often misunderstood—many believe it means a flood that happens once every 100 years, but that’s not how probability works. Instead, it refers to a flood that has a ...

If you live in a 1-percent AEP (100-year) flood zone, writes USGS, the odds of being flooded at least once over a 30-year mortgage are 26%. That's about a 1 in 4 chance.

A "100-year flood" means a 1% chance of that level of flooding happening each year. Houston saw three 500-year flood events within three years from 2015 to 2017, including Hurricane Harvey.

The Brief. A "100-year flood" means a 1% chance of that level of flooding happening each year. Houston saw three 500-year flood events within three years from 2015 to 2017, including Hurricane Harvey.

The Brief. A "100-year flood" means a 1% chance of that level of flooding happening each year. Houston saw three 500-year flood events within three years from 2015 to 2017, including Hurricane Harvey.

The Brief. A "100-year flood" means a 1% chance of that level of flooding happening each year. Houston saw three 500-year flood events within three years from 2015 to 2017, including Hurricane Harvey.

Harris County offers an interactive flood map to help homebuyers assess flood risks. HOUSTON — As the Bayou City dries out ...

Flood plain maps delineate the special flood hazard area — often called, somewhat misleadingly, the 100-year flood plain — where mapmakers calculate there is a 1% chance of flooding in any ...

The draft of a proposed new floodplain map for ... but add new zones of land around the North Montana Avenue-Crestwood Lane intersection and west of Interstate 15 to the 100-year floodplain. ...

Adopting the proposed map as it stands would add roughly 660 properties to the 100-year floodplain, remove roughly 390 structures and leave 700 properties unchanged, according to the Montana Free ...