NEW : A Iowa official says fuel fires , fanned by strong winds , are a concern . Mapleton had been shut down as authorities probed a possible gas leak . A Mapleton liaison calls the city 's Main Street `` a disaster , '' with debris everywhere . The National Weather Service also reported major damage in Nemaha , possibly from a tornado . Other Fayette County communities are also hit hard by just before midnight twisters .
NEW : A Iowa official says fuel fires , fanned by strong winds , are a concern . Mapleton had been shut down as authorities probed a possible gas leak . A Mapleton liaison calls the city 's Main Street `` a disaster , '' with debris everywhere . Other Fayette County communities are also hit hard by just before midnight twisters .