West Midlands Ambulance say the two children who were seen in difficullty in the River Arrow had been pulled form the water by the time crew arrived.
A spokeswoman said:
“Ambulance crews treated a six-year-old girl who was found to have a reduced level of consciousness and suffering from hypothermia. The girl was also found to have ingested some water from the river. Crews provided emergency medical treatment at the scene before airlifting the girl to Birmingham Children’s Hospital, where on arrival, she was conscious and talking to paramedics.
“A second patient, an 11-year-old boy, is also believed to have ingested some of the river water and was suffering from hypothermia. The boy again was provide with medical treatment at the scene and conveyed, via land ambulance, to the Alexandra Hospital in Redditch for further assessment and treatment."
More top news
It's believed there were around 8,000 people who laced up for this year's 10k race.
Sporadic outbreaks of rain will spread to all areas overnight, with some heavy bursts at first.
Cloudy with outbreaks of rain, mainly after midnight. Winds will start to ease.