Reports came in of the water main burst around 5:30 a.m. in the 1600-block of North Halsted Street, according to Chicago police.
Police blocked off Halsted between Willow Street and North Avenue as crews work to contain the damage.
WATCH: City crews clean up area after water main broke in Old Town
The CTA sent out a tweet confirming 8 Halsted buses would be rerouted.
[Minor Delays / Reroute] 8 Halsted buses are temporarily rerouted via Halsted, Willow, Sheffield, North Avenue and Halsted, due to street blockage.— cta (@cta) December 26, 2019
Peoples Gas also responded Thursday morning to secure nearby gas mains, as water could get into the lines, according to a spokesman for the company.
He later said gas lines for several addresses in the 1600-block of North Halsted would be shut off as a precaution.
Crews pumped water from garden-level units, and firefighters inspected buildings in the area.
Repairs were completed at around 3 a.m. Friday.