To let a situation calm down, become clear or certain, before taking any action.
down tools
To stop work, especially when taking industrial action.
hold one's fire
Wait, don't retaliate, calm down, be quiet.
hose down
To calm down a person, or a situation.
dust settles
A heated, angry, or confused atmosphere calms down.
put down to
To ascribe; to assume to be the cause of a situation.
blow over
To pass naturally; to go away; to calm down or subside.