The phrase "alert area" is correct and usable in written English.
It can be used in contexts related to safety, notifications, or areas designated for warnings or alerts.
Example: "Please pay attention to the alert area for any important updates regarding the event."
Alternatives: "warning zone" or "notification area".
The alert area would keep expanding as the abductor remains at large.
It extended its alert area on Thursday after finding the disease in dead birds in the 12 counties.
The soldiers "were moving towards [their] own posts when an alert area domination patrol spotted and engaged the intruders", it said.
"That might mean alerting people outside the alert area.
ALERT: Area law enforcement are conducting an ongoing investigation involving illegal drug activity.
But in rural areas — wildfire terrain — so-called "boomer" towers cast warnings 20 miles outside the intended alert area.
Eight hospitals in the Boston area hosted segments of the exercise, including a simulated activation of the Medical Intelligence Center, which proved integral in alerting area hospitals to the potential influx of victims on the day of the bombings.
He reportedly scooped up what he could carry and alerted area archivists, including those at UCLA, USC and the Academy of Motion Picture Arts and Sciences.
After the hurricane moved through the Yucatán Peninsula and entered the Bay of Campeche, the Weather Bureau alerted areas in the storm's path on the western side of Mexico's Gulf Coast.
After the bombing, the authorities sent what's being called an unprecedented cellphone alert to area residents, warning of the manhunt for a suspect.
The Local Government Association said council emergency planning teams were on full alert in areas with severe warnings, and authorities were on standby to provide rest centres for residents unable to return home because of weather or flood damage.
