a statistical calculation that helps the government determine floodplain maps, marking the boundary where there's a 1% chance of flooding in any single given year within an average period of 100 ...

A "100-year flood" means ... Given the changing nature of flood risks, communities and individuals should take proactive steps, including: Checking FEMA flood maps and assessing home insurance ...

Weather forecasters sometimes warn of storms that unleash rains so unusual they are described as 100-year or even 500-year floods. Here’s what to know about how scientists determine how extreme a ...

A "100-year flood" means a 1% chance of ... Given the changing nature of flood risks, communities and individuals should take proactive steps, including: Checking FEMA flood maps and assessing home ...