Best fire extinguisher.

Two of these can put out a parking lot covered in burning gasoline

They have enough power they kick like a 12 guage shotgun.

They don't go bad like the ones at the store do. They are very expensive you will probably need to source a used one from a place that rents them out.

The best bet for wildland fires are a sufactant, transferpumpp, water reservoir and a mixing head.

Surfactants make water stick to things better. People have successfuly used surfactants to protect there house from massive wild fires.

Where do you find surfactants. You find them in detergents. One of the best. Is dawn platinum.

https://www.influenster.com/reviews/dawn-platinum-dishwashing-liquid-refreshing-rain

I really hate chemicals but when you have to choose between letting everything burn and using chemicals

In case they shut off the water like Maui you need a transfer pump. Some thing like this.

A mixer like this will work

Not affiliated with anyone of these.