Health officials in Canterbury have warned people to avoid beaches, rivers and floodwaters for two days.
"It’s also important not to allow children to play in flood-affected areas until the clean-up is complete.
Canterbury Medical Officer of Health Dr Matthew Reid says the recent heavy rain has resulted in added pressure on sewerage systems and overflows into many waterways.
"Flood waters may have been contaminated with sewage and the most important thing to remember when cleaning up is to practise basic hand hygiene," Reid says.
"Always wash your hands using soap after being in contact with contaminated water, and after cleaning up areas affected by flooding.
The Heathcote River in Christchurch broke its banks yesterday. Photo: Dave McLoughlin via RNZ
"In general people should avoid rivers and beaches for at least two days after any significant rainfall event.
"It’s not safe to drink water from rivers or use the rivers or estuary for recreational activities."
More health advice after the recent flooding can be found here.
