The 2015 South India floods resulted from heavy rainfall generated by the annual northeast monsoon in November–December 2015. They affected the Coromandel Coast region of the South Indian states of Tamil Nadu and Andhra Pradesh. More than 500 people were killed and over 1.8 million (18 lakh) people were displaced. With estimates of damages and losses ranging from nearly ₹200 billion (US$3 billion) to over ₹1 trillion (US$14 billion), the floods were the costliest to have occurred in 2015, and were among the costliest natural disasters of the year.