The water level has risen in Saptakoshi River following incessant rainfall.
The red lights are put on and red flags hoisted after the water level crosses 150,000 cusec.
Chief District Officer of Sunsari Indradev Yadav said that the water flow in the river was measured at 158, 125 cusec on Wednesday morning.
It is considered as dangerous after the water level crosses 150, 000 cusec in the river.
Arable lands and human settlements have been inundated after the concerned authorities did not open all the gates off Koshi Barrage which is under the control of the Indian government.
The Sapkota Koshi has started eroding the land of SriLanka Island as the authorities have opened all the gates of the Koshi Barrage, local Santosh Chandrabansi said.
