Most domestic fires are caused by carelessness. They can happen when you are cooking or when you forget to blow out the candles, for instance. So always make sure you don’t forget to blow out your candles and turn off electrical appliances when not in use. You can find more information about this on the fire department website.
What to do in case of fire:
It may occur that a fire alarm is false. Always treat it like it's a real fire alarm to guarantee your own safety and your fellow roommates' safety.