The number of people reported missing in Kerr County, Texas, as a result of last week’s flash floods continues to soar. Authorities say search teams combing through the debris and destruction there are looking for more than 160 people who disappeared in the raging waters.

Days after flash floods killed over 100 people during the July Fourth weekend, search-and-rescue teams are using heavy equipment to untangle and peel away layers of trees, unearth large rocks in riverbanks and move massive piles of debris that stretch for miles in the search for the missing people.

Kerr County repeatedly failed to secure a warning system, even as local officials remained aware of the risks and as billions of dollars were available for similar projects.