A two-alarm fire has broken out at a home on Carlton Street on Wednesday morning.
Sixty firefighters and 15 trucks have been sent to the scene at 222 Carlton St.
They were called to the scene just after 10:30 a.m.
The Toronto Fire Service says an off-duty firefighter rescued a person from the building that is on fire.
Dave Archer was teaching a first-aid class on Wednesday morning, when the class was on a lunch break.
"As soon as we came out, I could smell the odour of fire, [which is] very familiar to me," Archer told reporters after the rescue.
Archer said a crowd had gathered out front of the Carlton Street building and the firefighter could see a man "hanging out" of a third-floor window.
The man said he couldn't hang on any longer, which is when Archer decided to see what he could do.
"I went in the front door, tried to hit the fire alarm — it didn't go off. So then I went upstairs to the second floor. It seemed safe enough that I tried for the third floor," Archer said.
"And as soon as I got up to the third floor, the smoke kind of cleared temporarily and I saw Chris — that's his name — and I just grabbed him, pulled him out of the window and escorted him down the stairs."
The building is located on the north side of the street, near Berkeley Street.
Police say Carlton Street is now closed between Parliament and Sherbourne streets, as a result of the fire.
The TTC says its 506 Carlton streetcars are diverting in both directions, along Parliament Street, Dundas Street East and Church Street.