Flash Flooding, Landslides, and Infrastructure Disruption in 11 Districts; Medical Relief in Thanchi, Humanitarian Aid in Lama, and Tourist Rescue
Persistent heavy monsoon rainfall and upstream hill flows since July 5, 2026, triggered severe flash flooding and landslides across 11 districts, notably impacting Bandarban and the Chittagong Hill Tracts. BGB and Army personnel were deployed for extensive rescue and relief operations, with over 600 people rescued, including four tourists trapped in Thuisapara, Thanchi, from July 4-13. The 38 BGB Bolipara Battalion established a medical camp in Thanchi, while local BNP members provided humanitarian food aid to 2,000 families in Lama. By July 16, 2026, waters receded and tourist spots began reopening.
Hazard specifics
Flood category
Flash Flood
River
Sangu, Matamuhuri, and Bakkhali Rivers
Water depth (m)
11.94
Trigger / cause
Continuous heavy monsoon rainfall, mountain runoff, saturation, and high risk for hill-side dwellers.
Affected scope
3 Records| Scope | Source wording |
|---|---|
| 11 · district | কক্সবাজার, বান্দরবান, রাঙামাটি, খাগড়াছড়ি, চট্টগ্রাম, ফেনী, সিলেট, হবিগঞ্জ, সুনামগঞ্জ, নেত্রকোনা ও জামালপুরসহ ১১টি জেলা |
| 7 · upazilla | লামাসহ বান্দরবানের সাতটি উপজেলা |
| 29 · union | ২৯টি ইউনিয়ন প্লাবিত |
11 · district
কক্সবাজার, বান্দরবান, রাঙামাটি, খাগড়াছড়ি, চট্টগ্রাম, ফেনী, সিলেট, হবিগঞ্জ, সুনামগঞ্জ, নেত্রকোনা ও জামালপুরসহ ১১টি জেলা7 · upazilla
লামাসহ বান্দরবানের সাতটি উপজেলা29 · union
২৯টি ইউনিয়ন প্লাবিতInvolved entities
5 RecordsSangu, Matamuhuri, and Bakkhali Rivers
33 KV Power Transmission Line and Substation
54 emergency shelters and Bolibazar Govt High School shelter
69 Infantry Brigade, 38 BGB (Bolipara Battalion), and Local BNP
Internal road networks, Bridgeghat Bailey bridge, Bajalia road sections, and Steel bridge in Naikhongchhari
Agencies deployed
Local Administration
District or Upazila level government authorities
Coordinating rescue, travel warnings, closed tourist centers, control room activated, relief supplies distributed; reopening tourist spots on July 16.
Note: District administration and other agencies prepared 220 shelters in 34 unions.
Fire Service and Civil Defence
First responder for fire, rescue, and medical emergencies
Conducted public awareness miking; active in rescue and relief.
NGO
Non-governmental organizations working in humanitarian aid
Distributed food and relief assistance to 200 families and waterlogged families in Tumbru.
Bangladesh Police
Law enforcement agency maintaining public order and security
Rescue and relief operations.
Bangladesh Army
National military force for land-based operations and disaster response
Conducting rescue, monitoring, relocation operations, and clearing roads.
Shelters opened: 220