There are more problems with formaldehyde in mobile homes that have been put aside for possible use by disaster victims.
Some of the thousands of mobile homes stored for use after disasters have formaldehyde levels about the same as in housing that's already been found to be unsafe for survivors of the 2005 Gulf Coast hurricanes.
That's according to Federal Emergency Management Agency test results obtained by The Associated Press.
Of the 32 mobile homes tested in Arkansas, three had levels high enough to put possible residents at an increased risk of cancer and respiratory illnesses.
There are more than 7,500 mobile homes stored at the Hope Municipal Airport in Arkansas. A contractor tested some of them to see if they were suitable for storm victims in Arkansas and Tennessee, which were hit by deadly tornadoes in February.