Thanks for the reply. I found these while searching. I assume they are all about the same, but these were taken from other state's/counties.
Alert 1 Airport (Possible Crash)
Alert 2 Airport (Probable Crash)
Alert 3 Airport (Crash/Aircraft Incident)
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ALERT 1 A plane in the air has minor electrical/mechanical problems. Units standby at fire station.
ALERT 2 A plane in the air has major electrical/mechanical problems. Units standby at runway.
ALERT 3 A plane has crashed at or near the airport.
ALERT 4 Hijacking, bomb threats or hazmat problems.
Still haven't found anything on levels, but will keep searching. If I find a list, I will make sure to post it.
EDIT:
Well, I did a search here and found...
Level 1) 1-2 Souls
Level 2) 3-10
Level 3) 11-25
Level 4) 26-50
Level 5) 51+
Compiled from the posts in
this thread