Schools and offices in Taiwan will close Tuesday and flights have been cancelled as Typhoon Maria churns towards Taiwan bringing torrential rains and powerful winds.

Maria was 500km east of the northeastern coastal town of Yilan with gusts of up to 190 kilometres an hour as of 10 am local time (0200 GMT), the weather bureau said.

Its impact was expected to be the strongest from late Tuesday to early Wednesday, with downpours up to 500 millimetres forecast in some areas, the bureau added.

Officials have warned of possible floods and mudslides.

Taiwanese authorities announced that offices and schools would close on Tuesday afternoon in five cities, including Yilan, where strong waves have started to pound the shore.

Local television footage showed farmers in Yilan rushing to their fields harvest scallions, the county’s most famous produce.

Fishermen in coastal Keeling also brought in their catch and secured their boats ahead of the storm, one day after dozens of ferry services to outlying islands were cancelled.

Taiwan’s UNI Air cancelled around 70 domestic flights on Tuesday while two other airlines have cancelled flights to the Japanese island of Okinawa.

Hong Kong’s Cathay Pacific said it has cancelled over a dozen flights between Hong Kong and Taipei, as well as from Hong Kong to Okinawa on Tuesday and Wednesday.

Premier William Lai warned local authorities and the public to “remain vigilant” for the first typhoon of the season in Taiwan.

He urged people to stay indoors and cooperate with the government’s disaster prevention plans.

The typhoon will not make a direct hit if it continues on its current trajectory, which would see it skim off northern Taiwan, according to the weather bureau.

Taiwan is frequently hit by typhoons in the summer. Last year more than 100 people were injured when Typhoon Nesat battered the island. AFP