Tom built a fallout shelter.

Strontium 90: One of the radioisotopes of strontium; part of radioactive fallout, harmful to human health.

There was some fallout.

Countries want to stem the spread of the virus but limit the economic fallout.

He made a farcical attempt to save face during the fallout of his sex scandal.

The primary culprits in eutrophication appear to be excess nitrogen and phosphorus—from sources including fertilizer runoff and septic system effluent to atmospheric fallout from burning fossil fuels—which enter waterbodies and fuel the overgrowth of algae, which, in turn, reduces water quality and degrades estuarine and coastal ecosystems.

This way to the fallout shelter.

Tom has built a fallout shelter.

Tom is going to build a fallout shelter.