Householders are being urged to check gardens and outbuildings for a woman who has been missing for nearly a month.
Vicki Milton, 42, has not been seen since she disappeared from her home on Pontefract Road in Ferrybridge on April 17.
She did not take a mobile phone and gave no indication about where she was going.
Police specialist search teams, helicopters, divers and dog units have failed to find her despite intensive searches within a half-mile radius of the property.
Detailed searches have also been carried out at Fairburn Ings RSPB nature reserve including in wetlands, marshlands, lagoons and pools.
Officers are planning further searches this weekend.
But they are also appealing to residents to check their own properties.
Detective Inspector Michelle Martin, of Wakefield District CID, said: “A massive effort has been underway to find Vicki and I want to firstly thank residents for all the concern they have shown and offers of help.
“It is now a nearly four weeks since Vicki went missing and clearly as time has passed we have grown increasingly concerned and the ordeal of not knowing what has happened to her has grown worse for her family.
“More searches are planned for this coming weekend and I would ask residents to check their outbuildings and gardens for any sign of Vicki.”
Mrs Milton, who has an 11-year-old daughter, is about 5ft 2in tall, of a large build, with very short recently dyed white-blonde hair, and blue eyes.
She has a tattoo of a flower on her left wrist and tattoos of a flower and butterfly on her left hand, and was wearing a black woolly jumper, dark denim jeans and grey Converse trainers.
Det Insp Martin added: “Every possible resource we have access to has been used in the hunt to find Vicki in what has been a painstaking and very difficult operation. We know Vicki didn’t take a phone with her on the day she left her home and didn’t make anyone aware of where she was going, providing very few clues as to her location.
“We will continue our enquiries and I again want to appeal to residents to contact us if they have any information about Vicki’s location. With searches of the most obvious locations now concluding, what we need now is that one vital piece of information to help us identify where she may be.
“I would ask everyone who knew Vicki to think back and try and remember if she mentioned anything to you in the days she disappeared which may help us find her. The smallest clue could be vital.
Anyone who can help should contact Wakefield CID on 101.