The death toll from flash floods in southern Thailand that swept away holidaymakers at two mountainside waterfalls has risen to 37. On Sunday, more than 300 rescue workers continued to search for bodies near the Sairung and Praisawan waterfalls in the Yantakao district of Trang province. Four people remain missing. Hundreds of people were at the two sites celebrating the Songkran holiday when the floods struck Saturday afternoon. The flood was triggered by three consecutive days of rain that raced down the steep Bantad mountain range.