A team of divers have been searching for two sunken cars in flood water under the West Coast Main Line bridge on Euxton Road near Chorley.
It is believed the pair have been commissioned by a local salvage company.
During an hour-long search on Wednesday evening, they conducted four sweeps of the flooded site but failed to find the cars.
They are set to return tonight.
The flood water is quickly becoming an attraction, with people travelling from across the area to have a picture taken at the site.