A GAS blast blew out the wall of a house and rocked homes in Mirfield.
The explosion happened at an end terrace back to back on Hepworth Lane shortly before 6am on Saturday.
The blast destroyed the roof and wall of a lean-to facing Hepworth Lane at its junction with Flash Lane scattering bricks and mortar into the road.
But despite the force of the blast, miraculously no-one was hurt.
Firefighters from Dewsbury and Mirfield attended the scene but no fire was reported.
Neighbours in five homes were evacuated and police set up a cordon sealing off access to the area.
The cordon stretched 180ft (55m).
A woman, thought to be in her 50s, who was in the house at the time was checked over by paramedics but was not injured and did not attend hospital.
A spokesman for Dewsbury Fire Station said the explosion had only damaged the one property and neighbouring houses appeared to be undamaged.
Yesterday the home was empty but neighbours confirmed a woman lived in the small house or her own.
Pensioners, George and Mollie Webster, who live opposite the scene, said they were told to go the far side of their bungalow while officials investigated the blast.