Excerpts from CBSChicago.com:

Emergency crews [Firefighters] rescued a man from the rain-swollen DuPage River in Naperville Wednesday night, the third such incident in two days.

Someone called 9-1-1 at 7:48 p.m. to report a person clinging to a tree in the DuPage River in the 1200 block of South Washington Street, according to a statement from the Naperville Fire Department. Crews Firefighters arrived at the scene five minutes later to find the 58-year-old man holding on to the tree and surrounded by fast-moving currents.

Fire department personnel positioned a safety line downstream while Swift Water Rescue swimmers entered the water to reach the man, who appeared to be hypothermic. He was safely removed from the water about 8:17 p.m.[and] evaluated by paramedics at the scene. A witness told authorities the man had entered the river in an inflatable canoe at Pioneer Park but failed to arrive at the designated landing area. He was not wearing a personal flotation device.

Earlier Wednesday, three teenagers were rescued after a motorist spotted them trapped on an island in the river near 95th Street and Eagle Brook Lane just after 1 p.m.

On Tuesday, three people were rescued from the river after their raft flipped over near downtown Naperville’s Riverwalk. No one was injured in any of the water rescue incidents.

A flood warning is in effect for several rivers across the Chicago area, including the DuPage River, because of recent heavy rains, according to the National Weather Service.