Three times in my life I've been in proximity to large bushfires, alone with no transport.
I did the whole routine with stopping gutters and getting hoses ready, but in a couple of those places there wasn't much water pressure to work with.
Lucky the wind never turned in my direction.
Pebbles were the best. Having one taught me a lot about the best tech not having all the bells and whistles. It's better to have only what you need done well.