Major I-95 cities -- Philadelphia, Baltimore, Washington, D.C., and Richmond, Virginia -- could be impacted as heavy downpours could bring 2-3 inches of rainfall per hour over already saturated soils, which could easily cause flash flooding.

In the early hours of Independence Day, rain pelted sleeping communities in central Texas. No one knew yet how devastating the storm would become.

Statistically, flash floods are the number one storm-related killer in the United States. Heeding those warnings could mean the difference between life and death.

Barry dissipated as a tropical depression four days before its remnants helped trigger the deadly Texas flash flood. And it's far from the only example of deadly inland flooding we've seen.

A swift-moving flood that swept through the Hill Country of Texas on Friday, killing at least 79 people and leaving many more missing, was a flash flood.

The National Weather Service issued a flash flood warning at 9:46 p.m. Tuesday night for Chicago and Cicero and the situation quickly escalated.