The Great Big One by J C Geiger

With natural disasters and nuclear war threatening their small town, two twin brothers find themselves enraptured by mysterious music that could change the course of their lives.
Everyone in Clade City knows their days are numbered. The Great Cascadia Earthquake will destroy their hometown and reshape the entire West Coast-if they survive long enough to see it. Nuclear war is increasingly likely. Wildfires. Or another pandemic. To Griff, the daily forecast feels partly cloudy with a chance of apocalyptic horsemen.
Griff's brother, Leo, and the Lost Coast Preppers claim to be ready. They've got a radio station. Luminous underwater monitors. A sweet bunker, and an unsettling plan for "disaster-ready rodents." But Griff's more concerned about what he can do before the end times. He'd like to play in a band, for one. Hopefully with Charity Simms. Her singing could make the whole world stop.
When Griff, Leo, and Charity stumble upon a mysterious...

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