Pretty much what the title says 
- can we have some more missions that expand into 'burning grass', 'little field fire' and 'large field fire'?
Burning cars, motorbikes and trailers could create the perfect recipe for this. Harvester fires, truck fires... Pretty much anything with wheels, fuel, and an engine!
This is a very common occurrence in my local area - particular in the hotter, drier months. Vehicle fires can very quickly spread to nearby shrub and grass - soon in need of a lot of assistance to get the fast spreading fire under control. Having these simple mission expansions could be a bit more challenging, and could generate even more fun 