Photo taken on May 20, 2020 shows a man walking in floodwaters caused by heavy rains in Ratnapura, Sri Lanka. (Photo by Gayan Sameera/Xinhua)

Locals ride in a boat through floodwaters caused by heavy rains in Ratnapura, Sri Lanka, on May 20, 2020. (Photo by Gayan Sameera/Xinhua)

Locals ride in boats through floodwaters caused by heavy rains in Ratnapura, Sri Lanka, on May 20, 2020. (Photo by Gayan Sameera/Xinhua)

Shops are seen in floodwaters caused by heavy rains in Ratnapura, Sri Lanka, on May 20, 2020. (Photo by Gayan Sameera/Xinhua)