Traffic is being detoured around a water main break in Sarnia's north end.
City crews responded to the break on Michigan Avenue, east of Murphy Road, at around 7:30 a.m. Wednesday.
To minimize the impact on businesses and a nursing home nearby, the repair is scheduled to be completed Wednesday night.
Michigan Avenue westbound is closed and eastbound is reduced to a single lane from Blu Aire Gate to Murphy Road.
The city said the road will be reopened Thursday morning.