Dalton collapsed on 23 February 2017 while playing a regular game of social touch rugby in her home town of Takapuna, Auckland. She was running at the time and was not injured in the game. She was immediately hospitalised in a critical condition with a ruptured internal carotid artery aneurysm. On 28 February 2017, her family turned off her life support. She died the next day, on 1 March, at the age of 45.