Flood scare in Sikkim and Kalimpong district (W.Bengal) - 17Jun2019

The Darjeeling - Sikkim Himalaya has thus far had very deficient in rainfall (see below)

 The SW monsoons finally arrived over the Darjeeling Sikkim Himalayas on 16Jun2019 almost 10 days late and we had relief from the heat here when there was a smattering of rainfall given by clouds shown:

Rainfall figures for 16/17Jun2019 are given (source IMD):

So I was rather surprised when we started getting flood alert messages from Sikkim on 17Jun afternoon on WhatsApp, that due to a 'cloud burst' in North Sikkim, the level of the Teesta river was rising dramatically and parts of Singtam (Adarsh Gaon), a business town one hour short of Gangtok and other low lying areas along NH10 were in danger.

Having kept a close look on the weather and rainfall of the region, which was nowhere near extreme, I personally feel that the dams at Chungthang and Dikchu in Sikkim had released large volumes of water after the rains which resulted in the Teesta river level rising sharply. I am aware that most of these dams are run-of-the-river dams, yet considering the steep descent path of the Teesta river and its turbulence, I do believe the volumes of water released caused the flood-like situation.
In this regard, I refer readers to the Youtube video below:

Updates on the above event:
Rainfall data of 17/18Jun (0830hrs to 0830hrs) available now:
Sankalan: 140mm
Mangan: 70mm
Chungthang: 50mm
(Source IMD)

Praful Rao,
Kalimpong district,
Darjeeling-Sikkim Himalaya