Fires can have electrical causes. The following are some possible sources of electrical fires and ways to prevent them from becoming hazards:

Poor contact between plugs and receptacles can cause arcing, leading to a serious fire hazard. Make sure that contacts are secure.

Overloaded circuits can, by overheating, be a cause of fires. Do not overload them by using extension cords or cube taps.

Inserting a fuse with an amperage rating that is higher than the branch circuit wiring is extremely dangerous. The fuse is there for a reason - if you blow a fuse it's because the circuit is overloaded or there is a short circuit in the wiring system. Replacing a blown fuse on an overloaded circuit with a fuse of a higher amperage will allow the current to flow without blowing the new fuse. Instead, the house wiring will overheat and the likelihood of fire increases.