The weather in Hong Kong will become unsettled later Saturday to Sunday as Tropical Cyclone Matmo is moving across Luzon and is nearing the city, according to Hong Kong’s weather forecaster.

With Matmo forecast to enter within 800 kilometers of the city later on Friday, the Hong Kong Observatory was considering issuing the Standby Signal, No. 1 during the night.

“According to the present forecast, Matmo will move in the general direction of the vicinity of Leizhou Peninsula to the eastern part of Hainan Island over the weekend and intensify gradually,” reads an HKO bulletin issued at 4:20 pm.

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Seas will be rough with swells, and there will be occasional squally showers, the observatory said.

The HKO would assess the need to issue higher tropical cyclone warning signals during the day on Saturday, depending on the distance between the tropical cyclone and the Pearl River Estuary, its intensity, and the change in local wind conditions.

With a very hot weather warning in force, temperatures in parts of Hong Kong rose to about 33 degrees around noon on Friday.

The Centre for Health Protection of the Department of Health reminded people to take appropriate precautions against heat-related illnesses, such as heat cramps, heat exhaustion, and heat stroke during very hot weather.

The tropical cyclone comes less than two weeks after storm Ragasa lashed Hong Kong with super typhoon wind force, prompting the authorities to issue the highest typhoon alert – Hurricane Signal No. 10.

READ MORE: HK in recovery mode after Ragasa onslaught

At least 101 people were hurt, many parts of the city were submerged due to flooding, schools and businesses were closed down, and flights were suspended for 36 hours during the Sept 24 typhoon.