(Reuters) – Unrelenting rain will drench the already saturated U.S. Midwest on Thursday and Friday, forecasters said, after floods in the region killed at least five people and forced residents in vulnerable areas to evacuate their flooded communities.

Parts of Missouri, Illinois, Arkansas, Indiana and Oklahoma could see as much as an additional 4 inches (10 cm) of rain as a slow-moving system is expected to hover over the region for at least one more day, the National Weather Service said in flood warnings and watches.

“The flooding in the middle part of the county has been unbelievable over the last couple of days … and we have more rain on the way, if you can believe that,” Weather.com meteorologist Ari Sarsalari said during his forecast on Wednesday night.

The National Weather Service issued flash flood warnings and watches along waterways from eastern Texas north through Indiana and into northwestern Ohio as forecasters expected most of the rivers across the U.S. Midwest to crest over the weekend.

Branson Landing in Branson, Missouri.
Photo by Austin Metcalf

The rain comes after five people were killed in flooding in Missouri, the last two of them swept from their cars on Monday and Tuesday, after a storm dumped almost 12 inches (30 cm) of rain in the region over the weekend, the National Weather Service said.

Schools throughout the Midwest canceled classes on Thursday as dozens of roadways and parts of interstate highways remained under water. Amtrak also suspended service in Missouri until at least Saturday, it said in a statement.

The heavy rains have caused levees to fail or to be breached along the Missouri, Mississippi and Ohio rivers and their tributaries over the last few days.

Hundreds of people in places like Eureka, Missouri and Pocahontas, Arkansas have heeded evacuation orders and advisories after building walls of sandbags to protect their homes and businesses from the rising waters.

(Reporting by Brendan O’Brien in Milwaukee; Editing by Toby Chopra)