The World Health Organization warns there could be a "health disaster" in South Asian countries hit by tsunamis if access to safe drinking water is not resumed soon. The organization estimated today that 500,000 people were injured in the deluge nine days ago that also killed around 150,000 people. Countries around the world are significantly increasing the disaster relief for tsunami victims. U.S. Secretary of State Colin Powell was in Thailand and Indonesia today to get a first-hand assessment of the damage. And he said the United States is making a significant contribution with its military forces and will help develop a regional tsunami warning system. "The United States will do everything that it can to assist the people of Thailand as well as the other nations of the region who have suffered as a result of the tsunami that took place last weekend." Singaporean Prime Minister Lee Hsien Loong and Australian Foreign Minister Alexander Downer are also in the region to assess the damage.