Thousands of people living in low-lying areas along the Yamuna are being shifted to safer places, as the river started swelling following heavy rains in north India.
Senior Delhi government officials said the release of more than 6.2 lakh cusecs of water by Haryana into the Yamuna from its Hathini Kund barrage has resulted in "serious flood-like situation" in certain colonies.
According to irrigation and flood control department officials, the river's water level is likely to touch 206 metres, a metre above the danger level of 204.83 metres, in the next couple of days.
Officials, however, said that only the Yamuna Bed area, meant to hold additional water during monsoons, will get flooded.
"We have made extensive preparations to ensure there is no loss of life and property due to the overflowing of the Yamuna," Delhi irrigation and flood control minister Ashok Kumar Walia said.
Senior officials said rehabilitation arrangements have been made along the Marginal Bund Road in areas like Usmanpur, Garhi Mandu, Badarpur Khadar, ISBT Bridge, Shastri Park, Old Yamuna Bridge (north side), Opposite Chilla Gaon DND flyway, Chilla, Mayur Vihar-1, near Akshardham Temple, Old Yamuna Bridge (south side), Okhla Batla House and Jamna Bazar in north east, east and south east Delhi.
The National Disaster Response Force has also been alerted to tackle any situation.