38040
The trick is to fill up completely, stay low under the first flock, fly in the middle of the screen over the second flock, drop low to hit the fire, then climb to the middle of the screen and accellerate to max speed. Skip filling up again as you should have enough to douse it the second time. As soon as you go feet dry over the fire island, decellerate to min speed, drop after the second flock and douse again. 2 water drops should be enough to douse the fire.
Most of the score comes from the time bonus, so speed is essential.
I guess reserve isn't so bad!