As we continue to grieve the loss of so many Hill Country flood victims, there is a lot of information being thrown around. KSAT wants to remind people what a “100-year flood” actually means.

It is not unheard of to have multiple “100-year floods” or "1,000-year floods” in the same year, says John Nielsen-Gammon, the Texas state climatologist.

After nine years, repair work continues on the Columbia Canal. On the anniversary of the 1,000-year flood that damaged the canal, City of Columbia leaders gave an update on several major projects ...

A 500-year flood means such an event has a 1 in 500 chance, or 0.2 percent, of occurring in a year. Another concept scientists use is how frequently an event of a certain intensity is expected.

After nine years, repair work continues on the Columbia Canal. On the anniversary of the 1,000-year flood that damaged the canal, City of Columbia leaders gave an update on several major projects.

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.

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.

With Central Texas devastated by deadly floods, many are asking: What’s a 100-year or 1,000-year flood, and are these terms ...

So no, a 100-year flood doesn't mean it can only happen once in a century. And with all the bayous, creeks and rivers in the area, our experts say don't be overconfident.