Not surprisingly, I can't get through on Bakka's phone line; but I don't think they've been caught up in the disaster.  Bakka Phoenix is Toronto's oldest SF bookstore, kind of a Mecca for SF travelers.  It's where Cory Doctorow worked before he published his first novel; myself, Peter Watts, and many other Canadian SF writers have held book launches and signings there.

A six-alarm fire is one level below the maximum on Toronto's scale.  I'm not sure what seven would look like, but this one involves over 100 firefighters, a dozen fire trucks, and essentially an entire downtown city block on fire.

The big problem is the cold and wind chill; I just saw a picture of a fire ladder completely encased in ice up against the side of a building.  Whatever they spray freezes instantly, so the storefronts, streets and sidewalks in the area are quickly turning into a glacial mess.  There's also a lot of smoke and transit chaos--just not a good place to be right now.

I wish the best for everybody affected; nobody's died, which is a blessing, but many people are homeless and local businesses may be devastated.  It's very sad.