New Delhi: Union Home Minister Rajnath Singh on Saturday left for Assam to take stock of the situation in flood affected areas of the state. "Leaving New Delhi for Guwahati to take stock of the situation in flood affected areas of Assam," Rajnath Singh tweeted. At least 20 persons were killed and over 17 lakh affected due to floods in the state's 21 districts. The minister is expected to make an aerial survey of the flood-affected areas of Nagaon, Morigaon and Kaziranga in Assam. He will also visit Bhagatgaon camp set up for the flood-affected residents in Morigaon district and meet Assam Chief Minister Sarbananda Sonowal and state government officials before returning to Delhi in the evening.