Which alarm condition indicates an attack by air is imminent?

An alarm condition indicating an imminent air attack typically involves the activation of air defense systems or radar systems detecting incoming aircraft or missiles. Specific alerts such as "Red Alert" or "Condition Red" may be issued, signaling the need for immediate readiness. Additionally, unusual activity or changes in enemy aircraft patterns can also serve as indicators of an impending air assault. Timely communication and situational awareness are critical in responding to such threats.