Maps show how heavy rainfall and rocky terrain helped create the devastating Texas floods that have killed more than 120 people.

At least 27 campers and counselors from Camp Mystic in Texas have died in devastating flash flooding that swept through the region, the camp announced. At least 120 people have died in the flooding that struck Texas Hill Country on Friday.

Some camps in the region had to be evacuated, and local newspapers described how Camp Mystic was among those cut off from the outside world. According to a Kerr County history book, floodwaters at Camp Mystic almost reached the top of the dining hall’s stairs.

Satellite imagery of Camp Mystic and other areas along the Guadalupe River shows the devastating aftermath of the Fourth of July floods in Texas.

HOUSTON - A family member confirms that a Camp Mystic attendee from Houston was found deceased in Kerr County following Friday's flash flooding. A family member confirmed with FOX 26 the passing of 8-year-old Mary Kate Jacobe. She was said to be found deceased on Sunday morning.

Flash floods surged through in the middle of the night, but many local officials appeared unaware of the unfolding catastrophe, initially leaving people near the river on their own.

Flooding in central Texas caused the Guadalupe River to flood. A Christian girls camp, Camp Mystic, was affected and some campers are missing.

KERRVILLE, Texas — At Camp Mystic, along the Guadalupe River, more than 20 campers are still not accounted for in the aftermath of history and deadly floods.