The official death toll from the storm jumped by nearly 1,200 to 5,209, with another 1,611 people still missing, the spokesman for the government's disaster management council, Reynaldo Balido, told AFP.
Super Typhoon Haiyan flattened dozens of towns across the central Philippines on November 8, bringing some of the strongest winds ever recorded and generating tsunami-like storm surges.
Balido said the death toll rose sharply today, increasing from 4,015, after officials reported body counts from communities outside the worst-hit areas.
"Now, the reports are coming in from the entire typhoon area."
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The Philippines endures a seemingly never-ending pattern of deadly typhoons, earthquakes, volcano eruptions and other natural disasters.
It is located along a typhoon belt and the so-called Ring of Fire, a vast Pacific Ocean region where many of Earth's earthquakes and volcanic eruptions occur.
But Haiyan now stands as one of the deadliest natural disasters ever recorded in the country, and the worst typhoon.
More than four million people were displaced, mainly on the poor, farming islands of Samar and Leyte.
The disaster has triggered a giant, international relief effort, with dozens of countries and relief organisations rushing to deliver food, water and health services to isolated communities.
The US military has performed the highest-profile role, while Japan has sent more than 1,000 troops in its biggest deployment since World War II.