Traffic chaos is reported from parts of the multimillion city Delhi. Both there and in many other cities, schools have been closed.
The red warning in the capital area is expected to apply for the entire week.
The water masses have also become deadly in the disputed Kashmir. There, water masses smashed a village in the mountains, according to Indian authorities.
56 people have so far been confirmed dead, but the number may rise. 80 people are still missing.
An additional 150 injured people have been rescued, of which 50 have serious injuries.
It's bleak news, says Omar Abdullah, state chief in Indian Kashmir.
The flood disaster is the second to hit India in August alone.
Further east, in the state of Uttarakhand along the border with China, a glacier has collapsed, resulting in new streams of water and debris in the area. This has in turn meant that the Bhagirathi river has been blocked so that a new lake with a diameter of over a kilometer has been formed near the tourist town of Harsil.
Facts: India's rain warning scale
TT
India's weather agency IMD has a warning scale for daily rainfall with four levels:
Green: Light rain, up to 64 millimeters
Yellow: 64.5-115.5 millimeters of rainfall
Orange: 115.6–204.4 millimeters
Red: Extreme rainfall, over 204.5 millimeters – equivalent to almost a third of what parts of Sweden get in a whole year.
Source: Indian media