Mayor Daley’s doctors say he’ll stay at Northwestern Memorial Hospital until the middle of the week at least.
The doctors still haven’t determined what caused the former mayor to get sick and feel disoriented on a business trip to Arizona.
An ambulance met him at the airport when he returned Friday.
He is said to be alert and in good spirits.
People in Chicago are sending along their best wishes.
Daley has had other health issues in the past, including the diagnosis of an irregular heartbeat several years ago.
He never had a physical exam during his last 10 years as mayor.