It was not a big surprise to learn that the cause of a major fire on the University of Nebraska-Omaha campus was a discarded cigarette. While the details are few, I'll wager there is a fair chance that a stubbed butt was tossed in a plastic container. This seems to be a common theme for smoking-related fires.
Fortunately, no one was killed, and only one minor injury to a firefighter occurred. The property loss is huge, however, and few if any of the displaced students have renter's insurance that will cover their personal property. I imagine they'd like to have a few private words with the careless smoker who caused this catastrophe.
The easiest way to avoid such fires is to quit smoking. The next best way is to extinguish and discard smoking materials in a non-flammable container. Duh.