Ms Sheedy said there had been a tree providing shade at the playground but it was removed as it was unhealthy.
A playground consultant, who has examined the issue elsewhere in New Zealand, advised the council there was minimal temperature difference between metal and plastic play equipment.
Ms Sheedy said metal slides were more durable than plastic and less prone to damage. "We have had issues with plastic slides being set on fire. We try to provide shade wherever possible, but we do feel there is an element of parental responsibility as well."
Readers on Hamilton News' Facebook page suggested adding shade sails.
There were mixed reactions from parents and caregivers at the park last Thursday. Jamie Gage, from Thames, said her town didn't have this problem as the slides there were plastic. She said shade sails would help to protect children from the sun.
Rosemery Hemsworth was looking after her two great nieces and said shade sails would be helpful. "The slides are really hot, it's not even a really hot day today."
Clare (surname withheld) said common sense had "gone out the window".
"Parents should not put their kids on a hot slide. Parents should use their brains - you wouldn't touch a hot steering wheel."
Sue Weaver, who was at the lake with her granddaughter Gigi Williams, said it was a parent's responsibility to ensure their child wore appropriate clothes - long pants, for example, to ensure they can use the slides without getting burnt.