The incident happened in G block and the balcony on the third floor suddenly collapsed due to the incessant rains.
There are at least 2,000 people living in the buildings, most of which are in dilapidated condition. The balcony collapse created tension among the residents since it would have turned out to be a major mishap if there were people in the buildings.
On information, Mylapore police visited the spot and conducted inquiries.
Similarly, the roof of a popular dargah on Mount Road collapsed in rain, but none was injured in the incident.
Meanwhile, more than 80 trees fell on the road blocking traffic in several parts of the city on Wednesday even as the Cyclone Nivar was at least 200 km away from Chennai coast. They were cleared by police personnel, fire and rescue (TNFRS) personnel and State Disaster Response Force (SDRF). Twelve SDRF teams, with the necessary equipment, assisted the police personnel in clearing water stagnation and unblocking sewage.