Fundamentally, "summer fire" is a symbol of power at its height, but without "water's limitation" this fiery heat will consume its possessor and threaten danger.
以「夏月之火」來說，本來是「勢力當權」，但若逢夏月之火旺盛而沒有「水制」，則又不免有自焚、傾危的危險。