Not so much an accident, but a 19-year-old man died after suffering a heart attack while riding the double-loop roller coaster built by Chinese manufacturer Hebei Zhongye Metallurgical Equipment Manufacturing Co.
May
Swimming Pool, Discovery Cove, Orlando, Florida
A 13-year-old girl died after being found unconscious in a pool at the marine-themed park. The girl was rushed to a hospital, where she was later pronounced dead. Source
TRP Game Zone, Rajkot, Gujarat, India
At least 33 people, including seven children, died in a fire that consumed the four-year-old amusement park that was built in temporary tin roof structures. The vast majority of bodies recovered at the site were charred beyond recognition and DNA samples were taken to identify the victims. The blaze was reportedly caused when welding work was being carried out. Source