Check under cushions for smoldering embers. Before you leave a room where people have been smoking, carefully check between sofa and chair crevices and under cushions. Check for embers, cigarette butts or matches. Make sure they have not been smoldering and remove them at once. Watch other people who are smoking.
Careless smokers can set themselves and the house on fire.
Be especially watchful of any smoker who is drinking alcohol or is sick in bed and may be smoking. Never smoke in bed. Even people who don't feel tired can doze off. Smoldering bedclothes produce smoke and toxic gases or flames. A mattress can give off as many as 11 different gases when it burns.