As authorities launch one of the largest search-and-rescue efforts in recent Texas history, they have come under intensifying scrutiny over preparations and why residents and youth summer camps that are dotted along the river were not alerted sooner or told to evacuate.

A high school soccer coach and his wife were found dead after floodwaters hit their vacation site on the Fourth of July. Their two kids are still reportedly missing.

The flooded area is in a part of Texas known as the Hill Country, where many people visit for the natural beauty. The region has also become known as “Flash Flood Alley.” Heavy downpours like the one that caused the Guadalupe River to flood have become more frequent and intense as the burning of fossil fuels has heated the planet.