At least 110 people are dead after heavy rain led to devastating flooding in Texas. Kerr County was hit the hardest, with at least 87 deaths, including 30 children. President Donald Trump signed a disaster declaration for the county and the Federal Emergency Management Agency is on the ground there.

Emergency officials are starting to focus on alert systems as they search for answers about how the flash flooding swept away so many.

As the search in Texas continued Wednesday for more than 160 people believed to be missing days after a destructive wall of water killed