India, Dec. 1 -- Three tropical cyclones, coinciding with the northeast monsoon that typically brings heavy downpours, have caused widespread destruction in Southeast Asia.

The storms - Senyar in Indonesia and Ditwah in Sri Lanka - have caused over 1,000 fatalities, making these two countries the hardest hit by heavy rainfall, flooding, and landslides. Follow Cyclone Ditwah live updates here.

In Indonesia, a week of heavy rains, worsened by the rare cyclone caused at least 502 deaths in Sumatra. About 508 persons continue to remain missing, according to AFP news agenct, which cited a tally published by the national disaster agency on Monday.

According to the Hong Kong Observatory, Senyar, which circled the Strait of Malacca last week, ...