A flash flood emergency has been issued by the National Weather Service for Tulsa, Broken Arrow, Collinsville, Inola and Pryor until 5:45 a.m.
At 11:39 p.m. emergency management reported numerous closed roadways, water rescues, and homes being evacuated.
"Three to five inches of rain have fallen, and additional heavy rainfall will move into the area soon. Widespread flash flooding is already occurring," the weather service said.
"Move to higher ground now. This is an extremely dangerous and life-threatening situation. Do not attempt to travel unless you are fleeing an area subject to flooding or under an evacuation order."
Additional rainfall amounts of 2 to 4 inches are possible in the warned area, forecasters said, including Interstate 44 between mile markers 217 and 269.