Blow itself out
Definition 1 of 2
Pro Tip 1/3Temporary State
The phrase suggests a process that resolves without intervention, often quickly. 
After the noise from the party, the house finally blew itself out and peace returned.
Pro Tip 2/3Not Literal
Used figuratively for situations, arguments, or events that die down on their own. 
The excitement about the rumor blew itself out when the truth was revealed.
Pro Tip 3/3Natural Resolution
Implies an issue will end naturally, without needing to be solved. 
He was worried about the protest, but it blew itself out without any trouble.