Flood alert was sounded in parts of Delhi, Haryana, Punjab and Uttar Pradesh as Yamuna and other rivers were in spate.
Delhi, Himachal Pradesh, Uttarakhand and Punjab are on high alert after heavy rains led to floods that killed at least 28 people, while about 22 are missing.
At least 22 people, including two Nepalese, were killed and nine others injured in rain-related incidents in Himachal Pradesh, while three people died and 22 went missing following a cloudburst in Uttarakhand. Three people lost their lives in Punjab.
Haryana has asked the Army to remain on standby after 8.14 lakh cusec water was released from the Hathini Kund barrage in the Yamuna river. An official said the Yamuna was flowing at 203.37 metre mark on the evening of August 18. The level is expected to rise in next 24 hours because of the water being released from the barrage.