Lancashire Fire and Rescue Service’s group manager, Mark Warwick, said of the dog teams: “In the time that they have been there they have roughly cleared about 500 buildings.
“The dogs are moving systematically through areas and are providing wide area search really, really quickly.”
Warwick, who is based in Fulwood near Preston, said communication and the conditions were proving tricky.
He added: “The heat and humidity is definitely a factor out there.”