Hovering above the debris-strewn Guadalupe River, drone pilot Jordy Marks scans the flood-ravaged landscape with a quiet determination. As part of a civilian search and rescue team, Marks is helping guide ground crews to areas still untouched nearly a week after deadly floodwaters swept through Central Texas.

At least 82 people have died, including 27 campers from Camp Mystic, following Texas flash floods that caused devastation over the holiday weekend.