Snapshot - 1645 GMT

* Rescue workers race to get food and water to millions of survivors, and struggle to clear airport runways to fly aid into regions where giant waves washed roads away as well as people
* United Nations warn that toll of about 150,000 known dead will rise as more bodies are found and survivors fall sick
* Touring the region, U.S. Secretary of State Colin Powell says the United States will help millions of survivors
* World's rich nations step up their efforts to help Asian countries devastated by the tsunami by offering to freeze billions of dollars in debt repayments
* Thailand fires its chief meteorologist and opens an investgation into why his department failed to issue a warning