NEW ORLEANS (WVUE) - It was a worst-case scenario in Texas as heavy rain led to deadly flooding early in the morning on the Fourth of July. A meteorological system known as a mesoscale convective vortex slowly swirled over the region, causing training storms and dropping heavy rain.

A July Fourth weekend deluge in Texas caused catastrophic flash flooding that has killed at least 89 people. Camp Mystic in Kerr County says Monday morning that it is “grieving the loss” of 27 campers and counselors as the search continues for victims of the disaster.

Rescuers searched the Guadalupe River for survivors of the Texas flash floods that killed more than 100 people over the July Fourth holiday weekend, with an unknown number of people still missing. The basin area was crowded with families and campers preparing to enjoy the holiday when pounding rain brought about catastrophic flash floods just before dawn Friday.