Did you check your circuit breakers or fuses? The loss of power could be a tripped breaker or blown fuse. A tripped breaker can be reset by tripping it all the way off and tripping it back on. Fuses should be replaced by a new fuse with the same amp rating. Your circuit breakers or fuses are housed in a main panel box which could be located inside or outside your house.
Are you prepared if the power goes out?
You can greatly lessen the impact of a power outage by taking the time to prepare in advance. You and your family should be prepared to cope on your own during a power outage for at least 72 hours.