The conditions are life threatening and could flood creeks, streams, streets, highways, underpasses and "urban areas," according to the NWS.

With more than 170 still missing, communities must reconcile how to pick up the pieces around a waterway that remains both a wellspring and a looming menace.

Another potentially life-threatening flooding event took place across Central Texas on Sunday morning, with torrential rain sending rivers and streams above their banks, forcing officials to stop search efforts along the Guadalupe River that had been underway since a catastrophic and deadly flash flooding event over the Fourth of July holiday.

Plans to develop a flood monitoring system in the Texas county hit hardest by deadly floods were scheduled to begin only a few weeks later.

INGRAM, Texas — Search and rescue crews from Mexico were forced to halt their operations on the Guadalupe River in Ingram, Texas Monday as rain caused water levels to rise, complicating efforts to find victims of the deadly July 4th floods.

A large percentage of people still unaccounted for were probably visiting the area, Kerr County Judge Rob Kelly said.

For the third straight day, thunderstorms have posed what meteorologists call life-threatening conditions in the Hill Country, where flooding earlier this month killed at least 131 people.

About four miles downriver from Acevedo's team in Kerrville, Roberto Marquez was found working on a memorial. "I've made 148. But I believe we need to make another 18," Marquez said. The artist is handmaking crosses to honor those lost across Texas.