A 30-year-old woman collapsed and later died after hiking with a friend for six hours on the Wu Kau Tang trail in Tai Po on Sunday.
She is survived by her husband and their four-year-old daughter, Apple Daily reports.
The woman, surnamed Choi, set off with her friend at Tai Mei Tuk in Tai Po at around 9 a.m.
At around 3 p.m., after trekking for almost six hours, Choi fainted and collapsed, but her friend did not realize this until later because she was a few hundred meters ahead of her, Ming Pao Daily reported.
Other hikers saw Choi lying unconscious on the ground and called the police. A helicopter was called to transport Choi to the Pamela Youde Nethersole Eastern Hospital in Chai Wan.
Medical staff made repeated attempts to resuscitate her, but she was pronounced dead not long after her arrival at the hospital.
Choi has no history of chronic illnesses and the cause of her death has yet to be determined.
Police said initial investigation showed no signs of foul play, adding that the woman could have had a heatstroke and all her personal belongings were intact.
Dr. Pang Kai-mau, from the Yan Chai Hospital accident and emergency department, said hiking is not a very taxing exercise and the weather on Sunday was not so bad as to cause a heatstroke.
It is possible that Choi had suffered from one of the three common causes of sudden death, namely heart attack, congenital heart disorder or stroke, Dr. Pang added.
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