GURNEE, Ill. (AP) — Illinois officials say roughly 6,800 buildings have been affected by flooding north of Chicago, and more damage is expected as rivers rise in coming days.

Gov. Bruce Rauner toured the area Friday before speaking outside a school in the Chicago suburb of Gurnee.

He says “the danger has not gone away” and authorities may be asking residents along the Des Plaines and Fox rivers to evacuate their homes as record rainfall moves south. The rains hit southern Wisconsin and northern Illinois on Wednesday.

Lake County Board Chairman Aaron Lawlor says about 2,100 structures — many located along the Chain O’ Lakes — are submerged. Lawlor says officials predict about 5,800 structures will be submerged soon.

He says “This is an unprecedented flood” and waterways will hit record levels.