(Reuters) – Heavy downpours were expected to drench the Gulf Coast of Texas and the U.S. Midwest on Wednesday and could cause flooding especially along already swollen rivers and in low-lying areas, forecasters warned.

Up to 5 inches (13 cm) of rain was forecast for parts of the Texas coast along the Gulf of Mexico and in the Middle Mississippi Valley states of South Dakota, Nebraska, Iowa and Kansas throughout the day and into Thursday, the National Weather Service (NWS) said.

“Be prepared for water over roads due to rapid rises on creeks and streams or even water flowing from farm fields,” the NWS in Des Moines, Iowa, said in an advisory.

Authorities closed roadways early Wednesday in several communities along the Des Moines and Mississippi rivers in the Midwest where intense rains have already fallen over the last few days, according to the NWS.

Showers and thunderstorms were also expected for Rockford, Illinois, where five inches of rain fell in less than four hours on Monday night. Emergency crews rescued people from numerous submerged vehicles.

In Corpus Christi, Texas, where more than 2 inches of rain was forecast after more than a foot of rain has fallen, crews conducted several high-water rescues on Tuesday while police closed roadways, local media reported.

(Reporting by Brendan O’Brien in Milwaukee; Editing by Jeffrey Benkoe)