A 24-year-old woman has been rescued after spending some 24 hours in a sewer ditch in southwestern Iowa.

Police in Council Bluffs say the unidentified, half-naked woman was found by two men late Sunday afternoon.

The woman told police she had been walking along a retaining wall Saturday, when she fell into a sewer ditch in the 500 block of North 6th Street.

Authorities say she spent the night in the ditch. The wind chill index at the time was around 6-degrees below zero.

The woman suffered hypothermia and was transported to a Council Bluffs hospital, where she was reported to be in critical condition.

The incident remains under investigation.

By Ric Hanson, KJAN, Atlantic