Beijing is expected to embrace the longest "sauna" days in the summer as Typhoon Prapiroon makes landfall in South China's Hainan Island, Beijing Morning News reported.

The hot, humid days will start from the weekend and last until August 9, the report quoted China's national observatory officials as saying.

During the period, the highest temperature will reach 32-33¡æ (89.6 - 91.4oF), and relative air humility will be 70%-85%.

Typhoon Prapiroon is steadily gathering strength while churning across the South China Sea from the Philippines and is expected to make landfall between Thursday night and Friday. Forecasters warned of possible severe destruction to parts of southern China.

All fishing boats have been ordered in to port and rescue teams told to prepare for flooding and landslides.

Prapiroon will also push a sub-tropical high-pressure belt north to the Chinese capital, resulting in the sauna days.

Before Prapiroon comes, most of the sauna days last just one or two days before interrupted by rainfalls, experts said.