UNION CITY (CBS SF) — A water main break reportedly caused by PG&E crews Thursday afternoon has flooded areas along Union City Boulevard, according to authorities.

City workers said PG&E was working on a gas line when they somehow broke a water pipe at around 3:30 p.m.

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Northbound Union City Boulevard was closed off between Smith Street and Whipple Road, according to Union City police. Drivers are being told to detour onto Dyer Street.

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Police expect to deal with traffic issues for the next few hours as Alameda County Water District crews make repairs to the broken water main.

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The roadway is anticipated to be closed for several hours and likely will not open up until Friday morning.