Emergency employees were called at a residential apartment building in Scarborough on Friday evening for reports of fire.
According to the Toronto Police Service (TPS), a woman was taken to a hospital in the 60s with serious, but non-neat injuries.
Authorities were called to the building after 7:30 pm in the building near Lawrence Avenue East and Kingston Road.
TPS says Blaze potentially began on a balcony.
No other details were released.