EVANS - City and county leaders are concerned about two mobile home parks destroyed in September's flooding that sit behind fences.
They say the trailers pose a serious health threat, not just to Evans, but to Weld County.
"I suspect we have 40, maybe 60 days at the most, before the weather warms up enough that we then have a secondary disaster in our community," Evans City Manager Aden Hogan said.
Evans Mayor Lyle Achziger says issues could include odor, rodents and other diseases that could spread past the fences of the mobile home parks.
Officials say it's getting worse by the day.
"Everything that was in these homes, in the refrigerators, in the freezers -- hazardous household materials -- all of that stuff is still there," Hogan said.
The Weld County Department of Public Health and Environment has sent letters to owners of both mobile home parks urging them to clean the mess up.
"For me to tear down somebody else's home, you're really stepping on someone's toes doing that," Eastwood Village owner Keith Cowan said.
He says he can't legally demolish the homes because many of them are not his to destroy.
"We're just caught between a rock and a hard place," Cowan said.
City officials estimate it would cost $1 million for them to clean the parks.
"That's a huge undertaking for a community our size," Achziger said.
He says though FEMA was generous after the flooding, the organization has denied the city's grant application to help clean up the mobile home parks.
"We've hit a brick wall, because we've been denied at every turn," he said.
The city is working with the mobile home park owners to try and figure out a solution, he said.
He says they are also appealing FEMA's most recent denial for financial assistance.