With a flood threat looming large due to a swollen Yamuna river crossing the danger mark in Delhi, authorities on Saturday began to evacuate hundreds of persons affected by the rising water level, officials said.

The river water level rose as heavy rains continued in Himachal Pradesh and Uttarakhand, with authorities releasing more water at Haryana's Hathnikund barrage during the day. The Yamuna in Delhi was flowing above the danger mark at 205.06 metres, an Irrigation and Flood Control Department official said.