Nepalese President Bidya Devi Bhandari is arriving in New Delhi on a five-day visit to India. This will be Bhandari's first foreign trip after assuming the office in October 2015, following the promulgation of the new Constitution in Nepal.
Error is in the first part of the sentence. 'Whole' is used with singular nouns. The correct sentence is - 'All Northern states in India are reeling under the devastating of the drought.