Is wall of thorns affected by damage of any kind or by fire?

@ThisRandomDude6 Is wall of thorns affected by damage of any kind or by fire? as written, no, but I'd allow fire spells of the same or higher level to damage it, 5x5x5 cube having 50 hp #wotcstaff

— (((Mike Mearls))) (@mikemearls) September 26, 2016