The India Meteorological Department (IMD) on Tuesday issued a red alert for heavy rainfall over most places in Assam and Meghalaya from June 15-16. An orange alert has been issued for the two states from Jun 17-18. IMD has also issued an orange alert for Nagaland, Manipur, Mizoram and Tripura till June 18 and for Arunachal Pradesh till June 17.