Texas officials are being questioned about warning systems ahead of the deadly floods. As NBC News' Priscilla Thompson reports, Kerr County doesn't have a county-wide siren warning system in place.

Over 12,000 volunteers have already assisted in Kerr County, according to the Texas Division of Emergency Management.

Twice, the Texas Division of Emergency Management turned down Kerr County's requests for money to improve flood warnings.

A Kerrville-area river authority executed a contract for a flood warning system that would have been used to help with emergency response, local officials said.

People awoke from water rushing around them during the early morning hours of July 4, all along the Guadalupe River in the Texas Hill Country. Residents were seemingly caught off guard, but warnings had been issued days and hours before floodwaters began carrying away homes,

Historic Texas flood leaves 161 missing and 96 dead. Rescuers battle harsh conditions, as communities grapple with heartache and aid reaches survivors.

The same region of Texas that experienced catastrophic, deadly flooding over the Fourth of July weekend also experienced massive flooding in the past. A 1987 flood in Kerr County resulted in the death of 33 people,

FEMA records show Kerr County officials did not use FEMA’s system to send warnings to phones in the critical hours as the flooding began on July 4.