On the heels of a typhoon that left at least 21 people dead in the Philippines and 33 others missing, another tropical storm brewing in the Pacific is expected to hit the area within days, according to the state weather bureau.

Typhoon Nesat -- referred to in the Philippines as Pedring -- displaced thousands but was expected to move offshore Wednesday afternoon, the state-run Philippines News Agency reported.

Nearly 321,000 people were affected by the typhoon in 29 provinces, the disaster council said. About 79,000 people were receiving assistance at evacuation shelters. More than 100 people were rescued across the country, the council said, many of them from boats.

Some roads around Manila were impassable due to flooding and falling debris, including branches that had been ripped off trees. Several areas in Metro Manila and nearby provinces were without electricity as the powerful storm cut power and transmission lines.

However, Tropical Storm Nalgae was 1,350 km (838 miles) east of northern Luzon, the island where Manila is located, and was expected to enter the Philippine Area of Responsibility within the next 24 hours, the council said in its 3 p.m. Wednesday update.

Nalgae is forecast to strengthen into a typhoon over the next day or so and is expected to move westward toward Luzon through the rest of this week, said Brandon Miller, senior meteorologist for CNN International. The storm is expected to make landfall in the Philippines on Saturday.