Raw sewage has flooded a Huntingdonshire park for the third time in under a year after torrential rain.
Toilet paper and "human waste" is spread across large parts of Wheatfields Park in St Ives.
It follows an amber weather waning for heavy rain issued by the Met Office on Thursday.
The 12-hour warning covered large parts of Huntingdonshire as "slow moving showers and thunderstorms" developed through the afternoon.
The park previously flooded in October following Storm Babet following heavy rain during Storm Babet.
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Resident and Chairman of St Ives Flood Action Group (FLAG) Mathew Setchell said the sewage posed a "serious health risk" to local residents and those using the park.
He told The Hunts Post: "This is the third, if not fourth, time that this has happened as a result of heavy rain and it poses a serious risk to those nearby.
"The flooding is largely caused by the groundwater table getting to a point that the sewers can't cope, and so the surface water escapes out of the sewer and onto the playing field.
"Anglian Water believe that either an illegal connection, such as a down-water pipe, or a whole in their sewer network exacerbates the issues, allowing water to escape out of the sewer."
He added: "The sewer networks gets compromised and basically fails because it can't process the amount of liquid coming in."
Setchell said that while he didn't expect Anglian Water to rectify the issue "immediately" he hopes the company will investigate the "root cause" of the flooding.
It comes as the action group has called for more to action to prevent future flooding in St Ives following the significant damage to properties over Christmas.
Mathew added: "The primary issue is that there's a health issue, but I'm concerned about the economic impact on the wider community, which will continue until action is taken to prevent flooding in the town."
A spokesperson for Anglian Water said: “The problems we’re seeing in Wheatfields Park are being caused by the extreme weather we’ve had this week, with a month’s worth of rain falling over just a few days.
"Our sewers in St Ives are only designed to take away sewage, but this rainwater can infiltrate into the sewer network and ultimately overload the system.
“We’re continuing to work with the local flood group to help manage the situation, and an engineer is visiting the park.”
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