A "100-year flood" means a 1% chance of that level ... floods once labeled "rare" have become alarmingly frequent. For example, Houston, Texas experienced three separate 500-year floods from ...

"We don't generally have 60-foot-tall hills anywhere in Houston ... of the area's 100-year floodplain has been drawn up and ...

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 ...

Weather forecasters sometimes warn of storms that unleash rains so unusual they are described as 100-year or ... experienced. Houston, Texas, was struck by three 500-year flood events from 2015 ...