how do underwater flares (or matches) maintain a flame or light when they are surrounded by water?

Question

Just watched Crawl (2019) and got me thinking.

Edit: i should clarify, why do they not extinguish like a normal flame.

In: Technology

Answer 1

Probably not THE answer but something similar:

Liquid Aluminum https://melscience.com/US-en/articles/characteristics-aluminum-and-combustion-reaction-m/

Edit: forgot this was eli5.. uhm..