(Western Iowa) – Firefighters across western and southwest Iowa battled large field/grass fires Thursday afternoon. According to a social media post by Portsmouth Fire Chief Mike Leinen, crews fought a blaze that was three-miles long and about one-half mile wide. The cause of the fire is not known. Portsmouth firefighters received assistance from multiple area fire departments inside and adjacent to Shelby County. Their efforts were aided by at least two-dozen farmers who used their disc implements to cover over 400-acres in less than 30-minutes, in order to prevent the fire from spreading even more.