The Upper Thames River Conservation Authority says flooding is expected in London due to rain and melting snow.
"We do not expect serious flooding but low lying areas will be flooded in many areas throughout the watershed, including Harris Park and potentially Gibbons Park, in London," said Mark Helsten, UTRCA Senior Water Resources Engineer.
He added the river will peak in Byron early on Friday.
Between 20 and 50 millimetres of rain has fallen over the watershed in the past 48 hours, dependent upon location, with generally more rain in the northern portion of the watershed.
An additional 5 to 10 millimetres of rain is possible Thursday.
Residents are reminded to use caution near all rivers, streams, ditches and ponds and to keep children and pets away from water.
Ice is unstable and thin, streambanks are slippery and the water is very cold, UTRCA says.
A flood watch has also been issued by the Catfish Creek Conservation Authority.
It says the watch is in effect for low lying, flood prone areas within the watershed.
