The weather is expected to deteriorate rapidly today as the most intense typhoon of the year hits the South China Sea. Strengthening winds and squally showers are expected in Hong Kong as Typhoon Dujuan moves past southern Taiwan on its way to Hong Kong. The outlook for tomorrow in Hong Kong is for heavy rain and squalls. Typhoon Dujuan was moving west or west-northwest at about 28km/h and was about 800km from Hong Kong last night. Dujuan developed in the western Pacific Ocean with wind speeds at its centre of about 170km/h, faster than any other typhoon this year. Due to the approach of the typhoon, the Hong Kong Space Museum has postponed the viewing of Mars through its telescopes, which had been scheduled for tomorrow night, to Wednesday next week. The viewing will be held at 7.30pm, at the podium of the Hong Kong Museum of Art, subject to weather conditions. There is a maximum capacity of 1,000 people. Free admission coupons will be distributed from 6pm on a first-come, first-served basis. The daily harbour laser show at Wan Chai will be suspended if the Observatory issues the standby signal No3.