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Haima was the second typhoon to hit Philippines in less than a week, lashing the country with torrential rain and raging winds.
It made landfall on the northeastern end of the archipelago about 11 p.m. (11 a.m. ET )Wednesday. The Joint Typhoon Warning Center downgraded it from a super typhoon before it hit land.
Winds of 220 kilometers per hour (137 mph) prior to arrival put it on par with a Category 4 hurricane, the center said. It's expected to affect as many as 2.7 million people in seven provinces before veering northwest toward the Chinese coast by Friday.
Crops and infrastructure are expected to be worst hit in areas close to the typhoon's path, a spokesperson for the Philippines' National Disaster Risk Reduction and Management Council said.
Thousands in evacuations centers
Hundreds of thousands of food packs were ready to be deployed by the government early on Thursday morning.
Typhoon Haima will be much weaker by the time it heads toward China, CNN meteorologists said, though flooding could still occur.
Second typhoon in a week
According to data going back to 1950 from the Joint Typhoon Warning Center, Haima will be just the third time back-to-back storms with an intensity of Category 4 or higher have hit the Philippines.
At least three people were killed Sunday as Sarika crossed the archipelago north of Manila as a Category 4 storm. Almost 10,000 people were displaced, according to aid organization Care International.
On Tuesday, that weather system made landfall on the southern Chinese island of Hainan, prompting the government to close schools in the island province and suspend high-speed rail services, China's state-run Xinhua news agency reported.
About 500,000 people were evacuated ahead of the storm, Xinhua reported.
CNN's Zahrah Ullah, Taylor Ward, Katie Hunt, Serenitie Wang and Reed Alexander contributed to this report.