Two British men stuck around a flooding Leeds beer garden for as long as it took to finish their pints.

At what point would you evacuate a beer garden when floodwaters start to rise. When it reaches your ankles? Shins? Knees?
Two British men stuck around a Leeds pub for as long as it took to finish their pints, and photos show them submerged up to their waists. 
@Leedsbeerfest shared some of them on Twitter and quipped, “Nevermind the weather- @Kirkstallbridge beer garden is open!! Cheers” 
Another