Thames was the biggest town in the Coromandel region and was all too familiar with the impact of climate change. Last January, Tararuwas flooded by rising seas and a king tide.
Thames residents approached by Local Focus agreed the council should do more to help tackle climate change.
"We are vulnerable on the Thames coast," Simpson said. "The thing that we've got to remember in terms of climate change, is that it's not just sea inundation but our bigger problem is weather events."
Thames Coromandel Mayor Sandra Goudie declined to be interviewed but has been reported as saying it would be irresponsible to commit ratepayers to "a contract without knowing specifications".
Simpson said he understood the council has delayed signing as it didn't want to commit ratepayers to something unquantifiable.
"[But] my personal opinion is that we should sign it," Simpson said. "Other councils have taken the lead and I think we're a bit late to the party."
Residents who disagreed with the council's stance were being encouraged to make their voices heard before the council was next to discuss the issue in April.
"Make sure you get hold of your local representative and make your views known," Simpson said. "After all, they represent you."
The signators to the declaration can be viewed here.
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