The Fate Of A North End Couch

I left the neighbourhood for one day and the whole place seemed to go up in flames. I read in the Friday Free Press that there were fires in the back lanes of Redwod, Alfred, and Aberdeen, all in the 300 block. Someone must have been busy with a book of matches.
When I got home Friday night, I did a quick drive down my own lane to check and make sure it was 'burn free'. No such luck.

There was one house in the lane that had a couch up against the back of it. The couch had been sitting there for as long as I can remember. But it was no longer sitting against the house. Its burned out carcass was up against the fence. And the back of the house had markings of a small house fire.

During my back lane walks I have been reporting bulky items that have been located in the lanes and against dumpsters. I know I can report those items and have them eventually taken away by the BFI trucks. I know I complain about the system, and how inefficient it is, but at least I can get those items removed from my neighbourhood.
But what can I do about the couches that sit in back yards. What can I do about the fire hazzards accumulating in so many of the yards of the North End? Is this an issue to report as a By-Law infraction? Should I notify the landlords that there are couches sitting in the back yards of their properties? Or do I just wait for them to be set on fire, and wait until someone moves the burned out carcass of the couch into the back lane so I can report it to 311 to have it picked up?
At least the fire was contained to the one house. And at least the fire was put out before it got out of control.