EVANS, Colo. - Some neighborhoods in the Weld County town of Evans may not be safe to rebuild.
That was the message Thursday night from Evans Mayor Lyle Achziger.
The mayor said 200 homes will be condemned and that number may double in the weeks ahead.
"There's propane, there's gas, there's oil, there's probably farm chemicals," said Achziger. "It's terrible. It's terrible."
He said the city and the health department will have to do environmental studies to assess neighborhoods in the southeast part of the city to determine if it's OK to rebuild.
7NEWS has learned a 6-month building ban is now in place in many of the water ravaged neighborhoods.
"Environmental tests need to take place to see if this is even a safe place," he said.
Achziger said a no flush order will likely stay in place to at least next Monday, because of damage to the water treatment plant. He said 400 portable toilets have been donated and have been placed around the city.
The news couldn't come soon enough for some residents.
"Thank goodness we have that port-a-potty. It made all the difference in the world," said resident Sharan Mann.
Achziger said the flood also changed the course of the South Platte River.
"For all intents and purposes, the river has made a new course for itself," said the mayor.