Heavy monsoon rains worsened by tropical storms have caused severe floods and landslides in southern Asia, killing around 700 people. Indonesia, Thailand, Sri Lanka, and Malaysia are the worst-hit countries. In Indonesia’s Sumatra island, intense rainfall began on Wednesday, devastating homes. A resident from Bireuen, Aceh province said, "During the flood, everything was gone. I wanted to save my clothes, but my house came down." Hundreds are missing and thousands remain stranded, some on rooftops awaiting rescue. By Saturday, Indonesia reported over 300 dead, Thailand at least 160, and Malaysia at least two. Sri Lanka has suffered more than 130 deaths with around 170 missing, impacted also by Cyclone Ditwah. Cyclone Senyar, a rare tropical cyclone, caused massive flooding and landslides in Sumatra, sweeping away homes and flooding thousands of buildings. Residents described floodwaters rising rapidly, swallowing entire houses. Rescue work faces difficulties due to bad weather. Tens of thousands have been evacuated in Indonesia but many still need help. In southern Thailand’s Songkhla province, floodwaters reached 3 meters, causing one of the worst floods in a decade with 145 deaths. Over 160 people have died across 10 provinces, affecting 3.8 million people. Hat Yai city recorded its highest rainfall in 300 years with 335mm in one day. Local hospitals struggled as morgues filled, forcing bodies to be stored in refrigerated trucks. A resident said, "We were stuck in the water for seven days and no agency came to help." The Thai government pledged compensation of up to 2 million baht ($62,000) for families who lost loved ones. Malaysia’s northern Perlis state also faced flooding, with two deaths and thousands displaced. Sri Lanka, hit by heavy rains and Cyclone Ditwah, reported over 130 dead, with 15,000 homes destroyed and 78,000 people in temporary shelters. Electrical and water supply outages impact about one-third of the country. Meteorologists link this extreme weather to the interaction of Typhoon Koto in the Philippines and Cyclone Senyar in the Malacca Strait. The monsoon season in the region runs from June to September, often bringing heavy rains. Climate change is making storms more intense and frequent, causing heavier rain, flash floods, and stronger winds.