Myanmar authorities said Thursday that 3,145 people had been killed, with another 4,589 people injured and 221 missing, and did not immediately update the figures on Friday.
The announcement of a temporary truce by the junta followed unilateral temporary ceasefires announced by armed resistance groups opposed to military rule.
The scale of destruction was unclear in Myanmar, where the military government keeps a tight hold on information. The U.S. Geological Survey estimated thousands could be dead.
The Japanese Meteorological Agency said tsunami waves have already reached the country's southwestern coasts, with an estimated maximum height of 3.2 feet.