Runner-up to Andrews-Paul was Artelis Thaureaux of Cuba and third was Victoria Tachinski of Canada.
For Alison's mum, Sam, at home in Masterton there was frustration that she could not find any website which enabled her to watch the race live but she and other family members were able to follow it on a site which gave an almost instant written account of what was occurring.
"We were a bit anxious when it said she was lying third but then it said she had won, and we were over the moon."
It was about an hour after the race that daughter and mother had a phone conversation and Sam said Alison was very aware that while the heat win was a good start the competition would be much tougher in the semis, of which there will be three.
The first two in each heat and the next two fastest times go through to the final.
"She knows she is going to have to run the race of her life to go any further, anything less than a personal best probably won't be good enough. She's determined to give it everything she's got, and I'm sure she will."
Sam Andrews-Paul said Alison was "quite overcome" with the huge support she had received from Wairarapa leading into the world championships, both in terms of financial assistance and messages of goodwill.
"She's often talked about how much she owes the Wairarapa now, and it's certainly been an extra driving force for her."
The world championships will be the last major competition for Alison Andrews-Paul before she leaves to take up an athletics scholarship at Baylor University, near Dallas, in the United States.
She was crowned Senior Sports Personality of the Year at the 2016 Wairarapa Times-Age sports awards in early June.