What does it mean when you fly the flag upside down?

Upside-down American flags flown outside Monrovia Public Library

Post Office flag flying upside down

Former neighbor disputes Alito's explanation of upside-down U.S. flag flying at his home

What Does an Upside Down Flag at SCOTUS Justice Samuel Alito’s House Mean?

The Upside Down Flag On My Channel...An Explanation

Veteran flies American flag upside down to signal distress for Florida waters

Man Flies American Flag Upside Down

Cape Homeowner Flying Flag Upside Down

Family flies American Flag upside down

American flags flying upside down at Cape complex

Upside down American flags in a West Palm Beach neighborhood

Photo of upside-down American flag at Justice Alito's home sparks controversy

Upside down American Flag leaves neighbors upset in Naples

Americans display U.S. flag upside down in protest of Roe v. Wade decision

American flag stolen from veteran who flew it upside down in protest

Flag seen flying upside down at Supreme Court Justice Samuel Alito’s home

Upside-down American flag reappears as a right-wing protest symbol after Trump's guilty verdict

Mixed reviews on upside down flag

Neighbors still reacting to upside down US flag in re-election protest