Over 100 people have died after heavy rain pounded Kerr County, Texas, early Friday, leading to "catastrophic" flooding, the sheriff said.

Flooding is a fact of life in Texas Hill Country, a region home to a flood-prone corridor known as “Flash Flood Alley.” Judge Rob Kelly, the top elected official in Kerr County, said as much on Sunday.

President Donald Trump announced that he signed a disaster declaration for Kerr County, Texas, where flash floods have killed scores of people. Trump said families of victims were experiencing "unimaginable tragedy.