With heavy rain battering the Taupo region recently, Lake Taupo is nearing 100 percent capacity.
With more wet weather forecast, preventing the lake from filling up even more may be difficult.
Measuring levels show the lake has less than 25 centimetres left before it reaches capacity.
If it continues at its current rate, service holes, stormwater drains and sewerage pipes could all take a hammering.
Waikato Regional Council’s Adam Munro says the situation is worrying, but he says they are working to find a solution.
One of the biggest impacts of Lake Taupo filling up so quickly is the erosion happening along the shoreline.