Earlier today, Health Minister Chris Hipkins told Morning Report there isn't a risk-free option.
"Who knows what may happen in any given week or month," he says.
"The question the prime minister will be weighing up today is what's the best thing from a logistical perspective in making sure that everybody can vote and everybody's vote can be counted."
Meanwhile, Green Party co-leader James Shaw says calls for a delay to the election are politicking.
"I think it's 100 per cent electioneering. There are some political parties who are clearly prioritising their electoral fortunes over the health of our communities and strength of our democracy and I think that's extremely disappointing."
New Zealand First leader Winston Peters has says he wants the election delayed, saying there is now no ability to conduct a free and fair election on September 19.
The decision is solely in the hands of Ardern, who took the weekend to look at the latest advice from justice officials and spoke to a number of different people.
If the dissolution of Parliament does not go ahead today as scheduled, an election date later than September 19 will have to be chosen.