I lived in southern California for a number of years and witnessed some horrific fires. But never anything like what Australia is experiencing now. Yes, the flames really can move so fast you can’t even outrun them in a moving car.
During one Los Angeles fire, the pilots made water drops at night. This was incredibly risky and had never been done before. But they had to stop the flames from cresting the other side of Topanga Canyon. And they did.
And they will stop them in Australia too.