The surge was caused by prolonged dry weather being followed by a burst of rain which made the isolator crack.
Sub officer Tim Smith said: ?No one was hurt as it was a small fire. But I would like to remind people to check the batteries in their smoke alarms.
?The alarm at this house had a dead battery so would have been useless.
?The number of deaths has been reduced thanks to smoke alarms, but they are no good if the battery is dead.?