Texan communities are dealing with the impact of the deadly flash floods along the Guadalupe River, which have killed at least 80 people so far. Search and rescue efforts continue for those unaccounted for,

The deadly floods that struck Texas on the 4th of July caught local officials off guard as the torrential rains caused the Guadalupe River to rise to near-historic levels in a matter of minutes, officials said at a press conference Saturday.

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.