At least 27 campers and counselors from Camp Mystic in Texas died in flash flooding, the camp announced Monday. Dozens of people have died in the flooding that struck Texas Hill Country on Friday. "Our hearts are broken alongside our families that are enduring this unimaginable tragedy,

A July Fourth weekend deluge in Texas caused catastrophic flash flooding that has killed more than 80 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.

Here’s what to know about the deadly flooding, the colossal weather system that drove it in and around Kerr County, Texas, and ongoing efforts to identify victims.