The water level of Yamuna is receding and the river is now flowing below the danger mark of 205.33 metres, an official said on Thursday. The level of Yamuna at railway bridge was 206.60 metres at 10 am. It is expected to recede further, the official at the flood departments control room said. The water level of Yamuna reached the highest level of 206.60 metres Wednesday morning and remained constant for nearly seven hours. The river started receding from afternoon and flowed at 206.44 metres at 6 pm. It had crossed the danger mark of 205.33 metres on Monday. Officials said around 23,000 affected people were evacuated from the flood-plains to safer places. Over 18,000 of them were accommodated in more than 2700 relief tents set up by the Delhi government agencies. A total of 35 boats were deployed to rescue the stranded people.