The National Weather Service began sending flash flood warnings that should have triggered cellphone alerts a little after 1 a.m., while local officials began posting on Facebook about four hours later.

As Central Texas reels from flash floods that killed over 100 people this weekend, questions are sharpening about whether officials could have done more to avert the tragedy – both in the decades leading up to the disaster,

Authorities overseeing the search for flood victims in Texas said Monday that they will wait to address questions about weather warnings and why some summer camps did not evacuate ahead of the catastrophic flooding that killed nearly 90 people over the July Fourth weekend.

It took just 90 minutes for the river to rise more than 30 feet. A look at the historic flood levels now etched into Central Texas history.

Six counties reported deaths from multiple severe flood events since Friday, July 4. Also, Kerrville officials reported that a privately owned drone collided with a helicopter conducting search and rescue operations.