The Yamuna river has spilled onto roads surrounding Delhi’s historic Red Fort, reclaiming its ancient flowpath as India’s capital is hit by severe flooding.

Authorities have evacuated more than 20,000 people in the city after torrential rain in northern India pushed water levels on the Yamuna to an all-time high.

Famous as the location from where prime ministers make their Independence Day speeches, the Red Fort was the showpiece of the Mughal Emperor Shah Jahan when he shifted his seat of power to Delhi in the 17th century.

At the time, the river would feed the fort’s defensive moats and pleasure-barges would dot its banks. Subsequent infrastructural developments have changed the course of the river, a tributary of the Ganges which originates in the Himalayas.

History buffs took to social media to highlight the force of the floods.

With heavy rainfall expected to continue in the Yamuna’s catchment area in Himachal Pradesh, water is spilling over major barriers along the river. The northern Indian state has been particularly hard hit by flooding, with the death toll there currently at 91, according to local media.

In Delhi, schools, colleges and universities are closed through Sunday and offices are asking their staff to work from home. About 25% of the city’s water supply will be affected due to the closure of its three treatment plants. Railway and traffic movement on the Old Yamuna Bridge, a crucial transport link, has also been stopped as a precautionary measure.

Heavy flooding have also hit three districts in the northern part of Bangladesh as the Teesta river, one of the largest in the country, is flowing 35 centimeters above the danger level.

--With assistance from Arun Devnath.