44-year-old Ramila was rushed to a hospital after she complained of severe chest pain at about 12:45 am but died without responding to treatment.
The JD(S) Corporator from Kaveripura was elected as the Deputy Mayor on September 28.
Ramila is survived by her husband D Umashankar and two children.
Karnataka CM HD Kumaraswamy condoled her death on Twitter.
"My heartfelt condolences to her family. May her soul rest in peace. Pray the Almighty gives courage and strength to the family to bear this loss," he tweeted.
He also informed that she had also participated in Namma Metro flagging off event held yesterday.
"She (Ramila) had actively participated with us at the Namma Metro flagging off event just yesterday. She was a dedicated social worker and committed party worker. It's shocking to learn that she is no more with us," Kumaraswamy tweeted.
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