The threats come amid public scrutiny over whether more could have been done ahead of the July 4 storm, which has claimed at least 132 lives.

As historic flash floods swept through Kerr County over July 4 weekend, killing more than 100 people and leaving families scrambling to escape in the dark, a years-old decision by county officials to block a proposed siren alert system has come under renewed scrutiny.

Texas authorities faced mounting scrutiny Thursday over the response to flash flooding that has left at least 120 people dead, as details surfaced about reported delays of early alerts that could have saved lives.