Another round of torrential rain and flash flooding came Saturday for parts of the South and Midwest already heavily waterlogged by days of severe storms that also spawned deadly tornadoes. Forecasters warned that rivers in some places would continue to rise for days.

At least 16 people were killed from weather-related fatalities this week, including tornadoes that destroyed entire neighborhoods and ensuing flooding.

The National Weather Service says a "multi-day catastrophic and potentially historic" storm is expected to impact multiple states. Thousands have lost power in Missouri and other states, and a person was killed Wednesday evening in the southeast part of the state.