UPDATE 4.19pm: State Highway 25 between Waihi and Whiritoa is now reopen, and Waihi residents are sharing the impacts of the "full scale" floods and evacuations in the region.

A SunLive reader says EMS services are evacuating people near the gas station.

On social media, local resident Mandie Thompson says the flooding happened "so fast".

A video showing the flooding at Browns Drive, Waihi Beach. Video: Mandie Thompson/Facebook.

Another Faceook user says they "have not seen such sheer volumes" of rain in their life, on the Waihi / Waihi Beach Noticeboard Facebook page.

EARLIER 3.08pm: State Highway 25 between Waihi and Whiritoa is closed in both directions due to flooding.

A Waka Kotahi spokesperson says motorists should follow directions of emergency services.

"Expect delays."

SunLive will provide an update as soon as possible.