Rescue workers patrolled by foot and by airboat in the search for those still missing from flash floods that swept Texas over the July Fourth weekend.

Search teams plodded through mud-laden riverbanks and flew aircraft over the flood-stricken landscape of central Texas for a fourth day on Monday, looking for dozens of people still missing from a disaster that has claimed at least 78 lives.

Camp Mystic, the summer haven torn apart by a deadly flood, has been a getaway for girls to make lifelong friends and find “ways to grow spiritually.”

"Camp Mystic is grieving the loss of 27 campers and counselors following the catastrophic flooding on the Guadalupe River," the camp said in a statement.