Deers drink water at Yala National Park in the southern district of Yala, some 250 km southwest of Colombo, on Sept. 11, 2014. Yala National Park, the second largest national park in Sri Lanka, is closed to visitors until Sept. 30 due to the ongoing severe drought. (Xinhua/A.Rajith)

Deers drink water at Yala National Park in the southern district of Yala, some 250 km southwest of Colombo, on Sept. 11, 2014. Yala National Park, the second largest national park in Sri Lanka, is closed to visitors until Sept. 30 due to the ongoing severe drought. (Xinhua/A.Rajith)

An Asian water buffalo is seen at Yala National Park in the southern district of Yala, some 250 km southwest of Colombo, on Sept. 11, 2014. Yala National Park, the second largest national park in Sri Lanka, is closed to visitors until Sept. 30 due to the ongoing severe drought. (Xinhua/A.Rajith)

An elephant is seen at Yala National Park in the southern district of Yala, some 250 km southwest of Colombo, on Sept. 11, 2014. Yala National Park, the second largest national park in Sri Lanka, is closed to visitors until Sept. 30 due to the ongoing severe drought. (Xinhua/A.Rajith)

Wild boars are seen at Yala National Park in the southern district of Yala, some 250 km southwest of Colombo, on Sept. 11, 2014. Yala National Park, the second largest national park in Sri Lanka, is closed to visitors until Sept. 30 due to the ongoing severe drought. (Xinhua/A.Rajith)

A bird is seen at Yala National Park in the southern district of Yala, some 250 km southwest of Colombo, on Sept. 11, 2014. Yala National Park, the second largest national park in Sri Lanka, is closed to visitors until Sept. 30 due to the ongoing severe drought. (Xinhua/A.Rajith)