Harrowing photos show what's left of volunteer Fire Chief Michael Phillips' emergency vehicle after he was swept away in devastating flash flooding in Texas.

Marble Falls Area Volunteer Fire Department Fire Chief Michael Phillips vanished while driving to a water rescue on Saturday around 4:30 a.m., according to officials in Burnet County, which is about 100 miles northeast of Camp Mystic, where 27 campers and counselors died.

Brad Perry was vacationing with his wife, Tina, for the first time in their brand-new RV at a campground in Kerrville, Texas, when disaster struck on Friday.

Over 100 people have died after heavy rain pounded Kerr County, Texas, early Friday, leading to "catastrophic" flooding, the sheriff said.

ABC News’ Juju Chang is joined by former FEMA administrator Deanne Criswell to discuss the growing questions surrounding the emergency response in Texas after devastating and deadly flash flooding.

In the wake of the deadly flash floods in Texas, state leaders are exploring whether to install more flood warning sirens. Such sirens can save lives if they're part of a larger warning system.

On Wednesday, hundreds prayed, wept, and held one another at a prayer service, among the first of many somber gatherings to come in the weeks ahead.