Xaotik Designs

But it takes a Boeing 747 jet filled with 20500 gallons of water to put it out.

I imagine the high-pressure water dump makes an impressive whoosh, but it is not at all audible over the roar of low-flying 747.  Via PopSci

With 8 times the capacity of the standard tankers used by firefighters, this is now the largest firefighting vehicle in the world.  On one fly by, it will cover a space 100 yards wide and three miles long.  It can drop its entire payload in 10 seconds.

I know if I were a raging brushfire in California right now, I’d be shitting my pants.