I'm new here and know very little about chemistry.
For the sake of a story I'm building, especially with symbolism, I'm having a fire person and a water person coexist in a romance. However, I'm using real world phenomena to help demonstrate it. I'm finding it easy to have water "live with" fire in some ways. Like thermite and other things "burning" underwater, undersea volcanoes, and hydrothermal vents. I also found this thread: What metal would burn steadily in a water lamp? Thanks to the addition of calcium carbide, a fire could technically be on top of water, as a reverse. But I'm not sure how long the two would last together. I'm finding it very hard-pressed to find other equivalents for water on a larger scale. The closest I found was a "lake" in the Halema'uma'u crater of Hawaii's Kīlauea volcano, but it wasn't exactly active (and technically not water). There's the other obvious combinations resulting in steam and the creation of cooled rock for islands, but they're over with almost instantly. I was wondering if there were other possible ones I may have missed. Like, is there any other physical ways for water to be next to fire without the two cancelling out?
Plus: How viable is the following? A scene I wanted to try involved a pool of water and waterfalls in a volcanic rock cave or cavern area with fire on top, yet not extinguishing. I figured maybe an additive of some sort could act as fuel for the fire and keep it perpetually going. Could a cycle involving evaporation help? If not full on waterfalls, maybe a sort of "rain"?
If something's not clear, please let me know.