AccuWeather said the private forecasting company and the National Weather Service sent warnings about potential flash flooding hours before the devastation.

The devastating floods have claimed 27 lives. More than 20 children are missing, and officials say more deaths are expected.

Flash floods in central Texas have led to at least 27 fatalities, including nine children, with many still missing, particularly from Camp Mystic. Patrick Keely/via REUTERS THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. MANDATORY CREDIT. NO RESALES. NO ARCHIVES. (Patrick Keely via REUTERS)