At 8:15 p.m. on Saturday, emergency responders were called to a unit on the 16th floor of a building on Silver Maple Court, near Queen Street East and Dixie Road.
At that time, a man was taken to hospital to be treated for burns to his arms.
Hours later, police said the 31-year-old man had been charged with mischief endangering life and production of a controlled substance, methamphetamine.
Police say the entire 16th floor has been evacuated. Residents are not allowed back for the time being.
Investigators are preparing a warrant, which if granted will allow them to collect evidence from the unit.
None of the charges or allegations have been proven in court.