Organizer Robbie Tomkins says they're trying to double their initial fundraising goal, as they did last year.
"Last year we doubled from $5,000 to $10,500 and we actually won fire department of the year across Canada for Muscular Dystrophy."
The initial goal this year was $7,500, which they've already passed. Tomkins says fire department members will dye their hair red if they can reach $15,000.
The rooftop campout runs March 17-20.