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

To add on to the other replies, it’s a similar reason to why rockets can still fire their engines in the vacuum of space; they bring their own oxygen with them.