Preparations have been intensified by the Centre and the state governments in the areas where cyclonic storm Yaas is likely to affect. 99 teams of NDRF are stationed in Odisha, West Bengal, Andhra Pradesh, Tamil Nadu and Andaman and Nicobar Islands, said NDRF Director General SN Pradhan on Monday. According to IMD, moderate to heavy rains are expected on May 26 and 27 in Assam and Meghalaya and on May 28 in Bihar. Meanwhile, heavy rainfall has lashed parts of Odisha today. As a precautionary measure, the Eastern Railway has stopped operation of 25 trains running between 24 May and 29 May.