Cambridgeshire Police have warned people to avoid driving unless "absolutely necessary" due to heavy rain in the area.
The force said there was localised flooding in March, Wisbech, Dry Drayton and Bar Hill, while traffic was moving extremely slow on parts of the A14 and surrounding roads.
"We would urge people not to go out in a vehicle unless absolutely necessary and also not to call 999 unless it is a real emergency where life is at risk," chief inspector Nick Night said.
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The boy was found unconscious and in cardiac arrest and was rushed to hospital where he died.
The victim, who was wearing her uniform at the time, was found knocking on doors nearly four hours after she was abducted.
There will be gales across Scotland and northern England this morning, but these will gradually ease through the afternoon.