Floodwaters be contaminated with debris as well as high levels of bacteria, chemicals, waste and other pollutants, which can cause prolonged health risks, experts say.

Search crews continued the grueling task of recovering the missing as more potential flash flooding threatened Texas Hill Country.

Numerous scattered showers and storms will continue in the area through Sunday, with pockets of heavy rain and an increase in the risk for flash flooding.

Texas has identified more than $50 billion in flood control needs, but lawmakers have devoted just $1.4 billion to address them

Some regions in the mid-Atlantic are also facing risks of flooding. On Sunday, Tropical Storm Chantal flooded parts of North Carolina, where more than 10 inches of rain fell near the Chapel Hill area. The Haw River, near Bynum, North Carolina, crested to nearly 22 feet, the highest crest on record there, as a result of those heavy rains.

Catastrophic flooding struck central Texas on Friday as the Guadalupe River surged by more than 20 to 26 feet within 90 minutes, causing widespread devastation and forcing mass evacuations in Texas Hill Country. At least 80 people have been killed in the floods while others remain missing or displaced and more than 850 people required rescuing.