Put kitty's litterbox and some.of your unwashed clothes outside so they can follow scent. He is probably close by so keep looking. Look under cars, bushes porches, etc. Call his/her name and put some food or treats out for him. Good luck! ❤
Notify police and the postal carriers in the area where lost. Check with neighbors or businesses nearby that may have cameras. Put a neon sign in your yard. Fill out lost reports with both Lost Dogs/Cats Illinois website (they have both) and Pawboost website. They will generate a flyer for you to print. Post in lost animal sites and community sites on FB. Put up flyers at nearby stores/gas stations and give some to pizza delivery places to put on their boxes. Put the outside flyers in a gallon sized freezer bag to protect from the elements. You can also try bus companies to put a flyer on their buses. Let the kids in the area know as they notice everything when not on their phones. Put food and water out and something with your scent. Check in nearby garages, sheds, window wells, ponds, look under decks. Also check with shelters in person or call as many as you can and give them a flyer. If the animal is chipped notify the company and make sure your contact info is correct. Also let vet and groomers in the area know. Please also be aware of scammers. Especially if you are giving a reward. Do not give them a code or anything they ask. Tell them you will give them the reward at the police station for both of your safety.