Water levels in Rangamati's Kaptai Lake rose rapidly following continuous heavy rainfall and upstream mountain runoff.
The Kasalong River in Baghaichhari upazila overflowed above the danger mark, inundating surrounding low-lying areas.
Concurrently, the majority of the wooden deck of the famous Rangamati Hanging Bridge went underwater. Authorities temporarily banned tourist entry and movement on the bridge to prevent accidents.
To manage the rising water levels, Kaptai Hydroelectric Power Plant authorities opened all 16 spillway gates on Saturday (August 29) at around 8:15 PM.
Each gate was raised by six inches, discharging approximately 9,000 cubic feet per second (cusecs) of water into the Karnaphuli River.
Local sources confirmed that abnormal water surges in Kaptai Lake inundated multiple low-lying coastal areas.
Flooding expanded across low-lying zones in Baghaichhari, Rangamati Sadar, and neighboring upazilas, submerging roads and residences while disrupting daily life.
Inundated neighborhoods in Baghaichhari municipality include Bottali, F-Block, Old Marishya, Masterpara, Madrasapara, Lailyaghona, Uluchhari, Baghaihat, West Muslim Block, and Madhyampara.
Several roads and homes went underwater, disrupting regular communication. Some affected families shifted to local schools for shelter.
Baghaichhari Upazila Nirbahi Officer (UNO) Amena Marjan stated that low-lying areas were flooded and officials are monitoring the situation closely.
Baghaichhari Press Club President Abdul Mabud noted that water levels are climbing fast, forcing multiple families into emergency school shelters.
The decision to open the spillway came as lake levels approached critical limits.
On Saturday at 2:00 PM, the lake water level was recorded at 105.64 feet Mean Sea Level (MSL), against its maximum capacity of 109 feet MSL.
Kaptai Hydroelectric Power Plant Manager (Superintending Engineer) Mahmud Hasan stated that gates were opened ahead of schedule due to the rapid influx.
-SA