In the third farmland level, Dusty Dash, the countryside is undergoing a tornado. There are also little mini dust devils that fling you around. However, most importantly, there are chicken enemies that scream out flames at you when you get close. Later in the level, those chickens are being blown around by the tornado, screaming and shooting their flames around, making you dodge them.
In the next level, Farmstead in Flames, the once-beautiful countryside is now on fire. The sky is brown from smoke, the blackened tree platforms crumble beneath your feet, and the music is intense. But the fire didn't start out of nowhere. It was caused by the fire chickens from the previous level, being blown around and spitting flames everywhere.