Trouble finding alcohol free RV antifreeze this season?

For all the comments about alcohol-based antifreezes not being flammable, please explain why every single one of them has a flammable warning on the label? I'm not the one that wrote the label's warnings, so don't flame me! (See what I did there!)

I'm no expert, but I'm guessing the evaporated fumes are more flammable than the liquid.