A tree came crashing down on a block of flats in Holland Close yesterday during a predawn thunderstorm, taking out windows from the third to sixth floors, and damaging a gas riser that served the block. Several residents of Block 1 were jolted awake at around 5.30am by a loud crash, and over 70 had their gas supply disrupted. The Singapore Civil Defence Force shut off valves to the pipes to isolate the gas leak. Madam Lau Ah Choo, 80, who lives on the third floor, was among those who were awakened by the storm. She found glass shards scattered all over her floor and mattress. "It was very lucky that I wasn't hurt," she said. Ms Shirley Aloysius, public relations manager for Tanjong Pagar Town Council, said the town council is working with HDB to contact the owners of five units whose window panes were damaged, to repair them. No injuries were reported but the gas supply was cut until 8.45am. Fallen trees were reported on the Ayer Rajah Expressway in the morning, with one understood to have caused a three-vehicle accident. No injuries were reported.