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

The official tally of storm-related deaths across Texas rose to 131 on Monday as authorities warned of yet another round of heavy rains 10 days after a Hill Country flash flood that transformed the Guadalupe River into a killer torrent.

Eight-year-old girls at sleep-away camp, families crammed into recreational vehicles, local residents traveling to or from work. These are some of the victims.

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

State and local officials said they did their best to coordinate evacuations and rescues, but better cellphone service might help in future floods.

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.

Betty Matteson’s four children, nine grandchildren and numerous great-grandchildren have squeezed into her Texas Hill Country home countless times since 1968.

Maps show how heavy rainfall and rocky terrain helped create the devastating Texas floods that have killed more than 120 people.