This will sound nuts.... hang your dirty washing out. If he's disorientated the scent will help him find his way home. Don't give up. In the last 8 weeks I have returned the same Greek cat to Swiss owners who were living locally. The first time the cat was trapped in the stadium between 2 false ceilings and the second time it'd strayed further to Port Glasgow. He won't be far, while you are looking for him, he's probably living it up. Get on local social media. Look out for rescues. That's how Maunzli the Greek cat got home. I help out, the owners had contacted for help. It's usually as simple as that.