Two north-eastern rivers, the Surma and the Kushiyara, have risen suddenly and were flowing above their respective danger levels (DL). This followed  overnight rain upstream in the Barak valley, swelling their source, the Barak river, in Manipur state of north-east India. The two rivers yesterday (Thursday) reversed their falling trend for the past few days, rising by 15cm and 19cm above their respective DLs at Kanaighat and Amalshid in Sylhet. However, the rivers pose no danger as they are expected to fall again because the Meghna, which carries their flow to the Bay of Bengal, was moving fast. The Meghna was carrying the combined flows of the Brahmaputra-Jamuna and the Ganges-Padma to the Bay. This left its drainage  channels clear, Sazzad Hossain, executive engineer of the Flood Forecasting and Warning Centre (FFWC), said yesterday.