Hong Kong experienced another round of torrential rains on Monday morning, resulting in the suspension of morning classes a day after Typhoon Noul brought heavy downpours and gale-force winds.

The Hong Kong Observatory hoisted the second-highest red rainstorm warning on 5:55 am, nearly half an hour after the lowest-level amber alert was issued at 5:30 am. The red alert was replaced by the amber warning at 7:45 am, “due to the local weakening of the areas of intense thundery showers approaching the territory from the west”, the HKO said in a weather notice.

The amber warning was canceled at 9:15 am.

Under the influence of an active southwesterly airstream, showers and squally thunderstorms were expected to persist over the vicinity of the Pearl River Estuary on Monday and showers will be heavy at times at first, according to the notice.

The Education Bureau announced classes of all morning and whole-day schools are suspended on Monday, reminding schools to implement contingency plans for students who arrive and ensure that conditions are safe before allowing them to return home.

As of 8 am, Noul has weakened to a tropical depression and was centered about 200 kilometers south of Changsha in Central China’s Hunan province, the observatory said, adding that it was forecast to move north-northwest at about 15 km per hour inland and dissipate gradually.

READ MORE: Typhoon Noul batters HK

The HKO warned the weather will be unsettled over the northern part of the South China Sea and the coast of Guangdong midweek this week under the influence of a broad trough of low pressure.

With the subtropical ridge extending westwards, showers will ease off slightly in the latter part of this week, the observatory added.