More than 1.3 million people died of typhoon-related illnesses and 4,000 people were killed in 2017, according to an estimate by the Philippines National Disaster Risk Reduction Council (NDRRRC).
The toll has been growing since early April when the storm swept through the southern Philippines.
At the time, a government report estimated at least 3,000 died.
The NDRRSC said it had identified more than 1,000 cases of typhoid in the country and that at least 4,400 people had died of the disease.
According to the NDRRC, the death toll has risen to about 3,500 as of May 9.NDRRC said the agency has received more than 500,000 calls to help out during the typhoon.
The Philippine government said the number of deaths caused by the typhoons is still rising, but it also blamed the typhoid epidemic on climate change, which the NDARC said has already worsened over the past decade.
“The weather and sea conditions are changing more rapidly and are now increasing the risks of the typhoids,” NDRSC Secretary-General Ernesto Abella told reporters.
“This is an issue that the government is working hard to solve.”
The typhoon swept through central Philippines on March 12 and devastated the capital Manila, which was the capital of the Philippines’ former communist archipelago of Mindanao.
The Philippines suffered from a lack of drinking water, power outages and heavy rains for the duration of the storm.
The government says more than 2.7 million people were forced to leave their homes.