A detour via Port and Heatherington Rds and Harry Watt Drive had been in place.
A Hato Hone St John spokesperson told RNZ one ambulance was sent and six people were taken to hospital with minor injuries.
Fire and Emergency New Zealand were alerted to the fire at 4.45am and sent 12 crews.
“The fire was well involved when we arrived and went to a third alarm level,” a spokesperson said.
A fire ripped through a Whangamatā house with Fire and Emergency New Zealand alerted at 4.45am this morning. Photo / Coromandel FMBrigades from Whangamatā, Ōnemana-Ōpoutere, Waihī, Whiritoa, Pāuanui, Tairua and Paeroa attended.
“Crews are dampening hotspots and leaving the scene now,” the spokesperson said.