A partial evacuation is now planned for the Kashechewan First Nation, as flood problems worsen for communities on the James Bay Coast in northern Ontario.

Both the Attawapiskat and Kashechewan First Nations have declared a state of emergency after sewer backups flooded basements.

Kashechewan chief Derek Stephen told CBC News 40 homes have water and sewage in the basement — leaving about 200 people with nowhere to sleep.

"Some houses, they are four to six feet under water in the basements. It has never been quite that severe," he said, noting the community has experienced similar flooding in previous years.

Emergency Management Ontario is co-ordinating an evacuation to move all 200 people affected out of Kashechewan. They will start boarding flights on Wednesday morning to the town of Kapuskasing, where emergency shelter is being arranged.

Stephen said his community is also under a boil water advisory, because flooding has affected the community's water treatment system.

Schools are closed, because they don't have working toilets.

Attawapiskat hospital evacuated

In Attawapiskat, the band office said at least a dozen homes have sewage in the basement.

Attawapiskat Deputy Chief Gerald Mattinas told CBC News the band met with federal and provincial officials on Tuesday to determine next steps.

"In the community, we don't have any accommodation to move [people]," Mattinas said. "However, we will try to do our best to keep people in the community for now."

Late Tuesday, Emergency Management Ontario said no further evacuation is planned for Attawapiskat.

Ten patients who were staying at the hospital have already been flown to other communities in northern Ontario, including Kirkland Lake, Englehart, Cochrane, Iroquois Falls and North Bay, said De-Anne Sheppard, director of patient care for the hospital in Attawapiskat.

Some nurses have also been flown out because their housing was affected by the sewer backup, Sheppard said Tuesday.

"We have lost over 50 per cent of our housing," she said. "We had to put some folks in hotels last night. And we are sending some more [nurses] out today."

Sheppard said the hospital must continue to provide emergency care as long as people remain in Attawapiskat. For now, a temporary emergency clinic has been set up at the community's health centre.

She added that health officials are advising anyone with sewage in their homes to find somewhere else to stay.

"We have houses now that have been sitting with the effluent water in their basements for more than 48 hours," she said. "It's a real crisis."

Schools have also been closed in Attawapiskat because the teachers' residence has been affected.

Flood assistance funding provided

Meanwhile, Aboriginal Affairs Minister Bernard Valcourt's office said the priority is ensuring the health and safety of members of both communities and officials are prepared to offer help, if needed.

In an e-mail to CBC News on Monday, spokeswoman Andrea Richer said the government has already provided funding directly to six Ontario First Nations, including Attawapiskat, and to the Mushkegowuk Tribal Council, to prepare for possible flooding this year.

"These funds are intended to support flood watch and emergency preparedness activities, including the hiring of an emergency response co-ordinator for the Mushkegowuk Tribal Council, hiring and training of safety officers in each community at risk of flooding, purchase of extra fuel for river surveillance activities, and the purchase of safety equipment," she wrote.

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