Weather forecasters often use terms like "100-year" or "500-year" floods. Here’s what those terms really mean and why these ...

A "100-year flood" means a 1% chance of that level of flooding happening each year. Houston saw three 500-year ... Checking FEMA flood maps and assessing home insurance coverage regularly.

Weather forecasts sometimes warn of storms that can unleash such unusual rainfall that they are described as 100-year ... that Houston, Texas, was struck by three 500-year flood events within ...

Weather forecasters sometimes warn of storms that unleash rains so unusual they are described as 100-year or ... with the climate Houston, Texas, was struck by three 500-year flood events from ...