It's a crash where someone dies from the crash. The word "Fatal" comes from the word "Fatality": meaning "to die".
For a fatal crash costs can soar to:
a fatal crash usually costs someone their life
My brother died in a fatal car crash.
The crash was fatal for all occupants of the vehicle.
$500,000
LIFE
Your life.
500,000
The driver received non-fatal injuries in the crash.
fatal error can cause software to exit/crash. When OS get Fatal Error then you may get the BSOD (the blue screen with the error that caused the OS to crash).
5,000,000
According to the National Highway Safety Administration, approximate cost per fatal crash $500,000.