Troy said that geology plays a big part of why flash floods can turn so deadly.

Texas Hill Country is no stranger to extreme flooding. In the rugged, rolling terrain it’s known for, heavy rains collect quickly in its shallow streams and rivers that can burst into torrents like the deadly flood wave that swept along the Guadalupe River on July 4.

Hundreds of campers were sound asleep early on Friday, expecting to wake up to a fireworks show and special treats of Hershey’s bars and Coca-Cola by the lake.

Veteran weather expert Troy Kimmel shares more about the area's unique geology.

The Texas Hill Country has a chance for a chance for a few isolated showers or storms on Wednesday afternoon. As of early Wednesday, flash flooding is not expected, but it cannot be completely ruled out.

A July Fourth weekend deluge in Texas caused catastrophic flash flooding that has killed at least 104 people. Camp Mystic in Kerr County says Monday morning that it is “grieving the loss” of 27 campers and counselors as the search continues for victims of the disaster.