All key leading officials from the Texas county hardest hit by the July 4 flash flooding that killed at least 136 people were absent from an emergency briefing call held before the tragedy unfolded, questioning from state lawmakers on Thursday revealed.

William "Dub" Thomas, the Kerr County Emergency Management Director since 2015, detailed his whereabouts during the crisis.

The five-year-old plan, required by the state, detailed when additional monitoring was to take place and who was responsible for alerting the public to evacuate.