Wan Chai. The canal is now covered by Canal Road. On 26 February 1918, there was a fire in the racecourse that claimed at least 590 lives. By the next day, as many as 576 confirmed deaths were reported by the Hong Kong Telegraph. It was caused by the collapse of a temporary grandstand, which knocked over food stalls and set bamboo matting ablaze. Most of the dead bodies became unrecognisable and assumed to be "Chinese". They were buried in the nearby So Kon Po area (now the site of Hong Kong Stadium). A Chinese-styled memorial site known as "Race Course Fire Memorial" was built in the Chinese cemetery (now behind the east stand of the stadium). In 1922, the Hong Kong Sanatorium and Hospital located in Happy Valley started operation. On 19 December 1941, the Japanese Imperial Army entered the hill east of the valley and fought their way to Blue Pool Road. On (now Blue Pool Road) a number of large massacres occurred, most notably the Blue Pool Road Massacre, where civilians were bayoneted. Civilians and Soldiers captured were kept in the appalling conditions of 'the black hole of Hong Kong' (a house on Blue Pool Road). The Japanese later advanced up to Wong Nai Chung Gap, where the battle of Wong Nai Chung Gap occurred, resulting in Japanese control of the gap. Although the low-areas of Happy Valley were captured, areas surrounding Leighton Hill and Morrison Hill were still contested until later in the Battle of Hong Kong. Characteristics Happy Valley is made up of upper-income residential areas. Residents are relatively diverse as to Hong Kong natives and foreigners. Two of the territory's tallest residential buildings, Highcliff and The Summit are specifically in Stubbs Road, facing Mount Nicholson. Happy Valley hosts six cemeteries, from south to north, the Happy Valley Jewish Cemetery, Hong Kong, the Hindu Cemetery, the Parsee Cemetery, Hong Kong Cemetery, St. Michael's Catholic Cemetery, and the Muslim Cemetery. The Hong Kong Racing Museum and the associated Happy Valley Racecourse, one of the two tracks of the Hong Kong Jockey Club, is in Happy Valley. Whenever a race runs, surrounding traffic patterns have to be changed: cars have to enter Happy Valley and the racecourse via Wong Nai Chung Road in a clockwise fashion, and the road may be heavily congested. The stadium lights in the racecourse illuminate nearby buildings even when the buildings themselves