Two gates of the Himayat Sagar were lifted on Friday to release the excess water as rainfall continues in the city.
The gates were lifted to release 700 cusecs of water into the Musi river.
Authorities of the water board warned people who live near the catchment areas of the river to be on alert.
In the meanwhile, The Hussain Sagar lake at the centre of the city has also filled to the brim due to incessant rains for the last four
days.
The lake touched the Full Tank Level (FTL) of 514.75 meters on Friday.
Authorities are closely monitoring the water level and the discharge.
State minister T Srinivas Yadav reviewed the situation with Greater Hyderabad Municipal Corporation (GHMC) Commissioner Ronald Rose.
The minister asked officials to alert people in low-lying areas including in areas abutting the discharge channels of Hussain Sagar.