Missing Blue-Eyed Cat Iago in Houston

Iago is a blue-eyed white male cat. He has medium-sized soft hair. He is chipped and wearing a blue harness. His chip number is 953010006731267, and the company has been notified. He escaped on Sep 01 while leaving our apartment for a walk. We live on the third floor at The Terraces of Brompton. Iago disappeared by the staircase connecting the third to the second floor. Since yesterday, we've been sweeping all floors for any traces.