Usually an Ice Flingomatic only barely covers an area of 6x6 turf, but with the power of Lureplants you can get up to 14x14!
(Wendy for scale)
So how does this work? During summer, if it's hot enough, if it's day and it's not raining, structures and items around the player have a chance to smolder, but Lureplants will always smolder first because they have priority (as far as I know they are the only items in the game like that). The Ice Flingomatic will extinguish the Lureplants