Crews from across the country are lining the main highway through Hunt, Texas, searching for the more than 170 unaccounted for victims following the deadly Fourth of July flood.
A Bay Area family from Marin County is among the dozens missing after a devastating flood in Central Texas. Mark Walker, 52, Sara Walker, 50 and their son, Johnny, 14, have not been seen or heard from since Friday's storm, according to family and friends.