( CNN ) -- At least 745 people have died in flooding in Thailand , Cambodia , Vietnam , Laos and the Philippines since July , the Regional Office for Asia and the Pacific said . Thailand has been hit the hardest , with 315 people killed in that time frame , officials said . Monsoon rains across Thailand have affected millions of people in 61 of its provinces , the country 's Flood Relief Operation Command reported . Cambodia , meanwhile , reported 247 dead since July . -- CNN 's Kocha Olarn contributed to this report .
Thailand has been hit the hardest with 315 people killed . Also hard-hit is Cambodia which has reported 247 dead .