More than 40 people, including children, are still missing after a wall of flood waters surged after heavy rainfall.

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.

K err County Sheriff Larry Leitha said in a press conference Sunday morning that, as of 9 a.m., 59 people have died in the catastrophic flooding stemming from a storm early Friday morning in Kerrville, Texas. Of the 59 victims, 38 are adults including 18 unidentified, and 21 are children including four unidentified.