KERRVILLE, Texas — In the hours before the flood, the Miller girls — Eliza, Genevieve and Birdie — were eating fajitas in the Camp Mystic mess hall and watching counselors act in a “Wicked” skit.

People awoke from water rushing around them during the early morning hours of July 4, all along the Guadalupe River in the ...

Amid chaos from the flood, campers huddled with young counselors—many unaware of the devastation just yards away.