1. Little wonder that the material used to keep the rooms warm was polyurethane foam, a material that can easily catch fire and once on fire emits toxic gases.
2. The extreme heat caused a Beijing bus to catch fire on Tuesday morning.
3. On hitting the ground, the second explosion occurred causing the fuel tanks to catch fire.
4. The anxious Wang then told the crew on board that his home would catch fire unless the stove was turned off in time.