"air alert" is a grammatically correct and usable phrase in written English.
It can be used in various contexts, but it is commonly used to describe a situation where people are on high alert for potential air attacks or threats. Example sentence: The city was under an air alert after receiving reports of enemy planes flying over the area.
A Code Red unhealthy air alert, as we had here yesterday, leaves the streets deserted.
The males have positioned themselves like sentries, sniffing the air, alert, dangerous and manifestly seeking trouble.
Air Alert valve caps, from Aviation Upgrade Technologies, blink when the pressure drops significantly in the tires they are mounted on.
The San Joaquin Valley Air Pollution Control District issued an air alert, the second this year, on Monday for San Joaquin, Stanislaus, Merced, Madera, Fresno, Kings and Tulare Counties and parts of Kern County.
Word of the dogfight spread throughout the area, and an air alert was quickly posted over Seoul.
Air Alerts fit on the tires like normal valve caps, and calibrate themselves to each tire's pressure (from 10too 139 pounds per square inch).
To keep levels of the microscopic air pollutants from getting worse, the Bay Area Air Quality Management District called a record-tying 30 days of "spare the air" alerts banning residential wood-burning, up from 10 last winter.
On "bad-air days" or "air-alert days," particularly during the warmer months, kids with asthma are forced to stay indoors to avoid aggravating their condition.
The Rim fire continued to spew out huge clouds of smoke that prompted hazardous-air alerts more than 100 miles away in Carson City, Nev., officials said.
Another information tool is provided by accessible air pollution alert services that provide real-time data and proactively alert registered users of impending pollution events via a computer/tablet (websites, email, social media) or phone (texts, apps) (London Air Quality Network; City of London).
These messages were widely disseminated in mainstream media, and SMS text alerts were sent to those subscribing to the NSW Office of Environment and Heritage (OEH) air quality alert website [ 16].
