Six people were injured and up to 150 houses were damaged when a tornado swept through several London streets leaving a trail of destruction.
Rooftops were ripped off and cars were badly damaged as the freak weather hit the Kensal Rise area.
One man suffered a serious head injury and five people were treated at the scene for minor injuries and shock.
Fire services have sealed six roads in a zone covering a quarter of a square mile and searched 100 properties.
Fire crews were called at about 1100 BST on Thursday to Chamberlayne Road and surrounding streets, amid reports of collapsed scaffolding and damage to buildings.
Read More