At 7am, Tropical Storm Podul was estimated to be about 260km northeast of Hong Kong.

Forecaster will assess the need to issue higher warning signals later on Wednesday to early Thursday.

City expected to experience heavy downpours, violent storms on Thursday amid ‘obvious changes’ over later this week.

Under the influence of Podul, it will be very hot over Guangdong, with heat-triggered showers set to affect the city later on Wednesday, forecaster says.

At 7am, Tropical Storm Podul was estimated to be about 260km northeast of Hong Kong.

But Education Bureau says if warning is lowered to amber at or before 10.30am, afternoon school classes will proceed as usual.

Forecaster raises red rainstorm signal at 11.10am, says No 1 typhoon warning will be cancelled at 12.20pm.