MADISON, Wis. — Gov. Scott Walker has activated the National Guard to help with recovery efforts following destructive flooding in northern Wisconsin.

Portions of northern Wisconsin saw as much as a foot of rain over the weekend, the Milwaukee Journal Sentinel reported . Ashland, Bayfield, Burnett, Douglas and Iron counties remain in a state of emergency.

All state agencies have been directed to help deal with the flooding, the state Department of Military Affairs said in a statement Tuesday.

Lori Getter of Wisconsin Emergency Management said no Guard members had been deployed as of Wednesday morning due to a lack of requests for assistance.

Flood warnings were still in effect Tuesday for portions of southeast and south-central Wisconsin. The Milwaukee area has received more than 4 inches (102 millimeters) of rain since Monday, which flooded streets and overwhelmed sewer systems in the area.

Combined sanitary and storm sewers spilled into local rivers for nearly 24 hours when the deep tunnel ran out of room to contain overflows from Monday's storm, according to Milwaukee Metropolitan Sewerage District officials. The district began using overflows to waterways to stop sewage from backing up into buildings.

Portions of the Mississippi River may flood in the coming days because of all the rain, according to forecasters at the weather service office in La Crosse.