Educational institutions and offices functioned as usual and state transport buses were operated.
However, security was beefed up across the state.
The 68-year-old Jayalalithaa was admitted to the hospital for treatment of fever and dehydration on September 22.
The doctors later said she needed a longer hospital stay as she was suffering from infection, and put her on respiratory support.
Read More: Jayalalithaa LIVE updates
Recently, Apollo Hospitals Chairman Pratap C. Reddy told media that Jayalalithaa was returning to normalcy, and had been shifted out of Intensive Care Unit as there were no health complications.
She could go home whenever she decides to do so, he had said.
According to Apollo Hospitals, Jayalalithaa is under continued observation following Sunday's cardiac arrest.