The 100-year distinction goes thus: Every year, there is a one in 100 chance of a waterway reaching a certain elevation. That number is the 100-year level, and it is declared by the people who ...

Meteorologists use phrases like “the “100-year flood” to describe severe weather conditions. There’s a misconception that such a term indicates that a high level of flooding only happens ...

A key point is that a 100-year flood does not mean it will flood every 100 years, but rather there is a one percent chance of that level of flood happening each year.

Texas inspectors approved Camp Mystic’s emergency plan just two days before devastating floods killed over 27 people, mostly ...

Tampa saw another "100-year" rain event, with 2.3 inches of rain in about 30 minutes on Monday, according to the city.