Four fire engines and 21 firefighters and officers were called to reports of an electrical explosion at a shop in Hackney.
The explosion at a parade of shops in Felton Street caused a shop front to blow out.
One woman was treated by London Ambulance Service and 10 people left an adjacent property before the Brigade arrived.
The Brigade was called at 1313 and the incident was over for us at 1426. Crews from Islington, Homerton and Bethnal Green fire stations attended the scene.