The groups also want lawmakers to examine land-use practices and consider ways to protect natural resources, which they say will in turn help protect lives.

Kerr County had discussed buying such things as water gauges and sirens after previous flood disasters. But as with many rural Texas counties, cost was an issue.

At least 27 campers and counselors at Camp Mystic perished in Friday's floods, with the total death toll in the floods now surpassing 100.

There are questions over why oversight was eased at Mystic Camp as it expanded in a hazardous floodplain, the AP reported.

Many camps in the Guadalupe river region are adjacent or are partially inside high-risk flood zones, according to maps from the Federal Emergency Management Agency.

When too much rain falls for the ground to absorb, it runs downhill, pulled by gravity into streams, creeks and rivers.

The deadly Texas floods have brought the state's approach to land approvals, especially in flood-prone areas, under more scrutiny.

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.

The July Fourth flood moved so quickly in the middle of the night that it caught many off guard in a county that lacked a warning system.

Experts share key questions parents should ask about summer camp safety following the deadly Texas flooding that left dozens dead at a girls’ camp.

The camp where 27 girls died successfully challenged initial risk designations by US regulators, according to reports.