In the wake of catastrophic flooding in Central Texas that left more than 125 people dead and dozens missing, federal and state officials have warned residents and donors about a surge in disaster-related scams designed to exploit vulnerable families and charitable givers.

Rainfall amounts of 1-2 inches and isolated amounts of 3-5 inches are possible, the National Weather Service said.

Major flooding is expected for parts of Texas near the Frio River, the National Weather Service warns. See which counties are at risk Monday.

Responders from six Alabama cities are part of the teams that will help search for about 170 people still believed to be missing.

Search-and-rescue operations along the Guadalupe River were halted Sunday after a new round of heavy rain led to more high-water rescues and prompted fears that waterways could surge again above their banks.

More than a week after deadly floods struck Central Texas, search and rescue teams are continuing to probe debris for those still missing.