A hydrologist explains why Texas Hill Country is known as Flash Flood Alley and how its geography and geology can lead to heavy downpours and sudden, destructive floods ...

In parts of Chicago, flash flood alerts rang Tuesday, but how much rain actually fell across the region and how fast did it all happen?

What can be done to improve flash flood safety? First, it’s important for people to understand why flash flooding happens and just how fast the water can rise and flow.

The deadly flooding in central Texas has stunned the nation, but this isn't the first time this region has seen devastating floods. Here's a breakdown of the area's history.