that car was on a road and a gust carried the fire something like 40 or 50 metres across a highway. here is a paper for you that caps out at 600c for water spinklers. aluminium doesnt melt until 660c. regular water sprinklers are only rated to something like 3 or 400c.   /5190 you are likely going to have to come up with a new sprinkler design if you want to make your idea feasible.
Germany