22,000

From 351 to 22,000 in a matter of days:

The cyclone death toll soared above 22,000 on Tuesday and more than 41,000 others were missing as the international community prepared to rush in aid after the country's deadliest storm on record, state radio reported.

...and I thought 4000 was bad.

UPDATE: Glenn Reynolds: "But this sucks, if possible, even more: 'Myanmar's reclusive military rulers insisted foreign aid experts would still have to negotiate with the government to be allowed into the isolated nation.'"