
The orange flag is used as a warning system in different contexts, such as in the Air Quality Flag Program and at beaches. In the Air Quality Flag Program, the orange flag is flown when air quality is forecast to be above federal health standards, indicating a High Pollution Advisory (HPA). At beaches, an orange flag indicates environmental hazards, such as pollution or high bacterial counts, warning swimmers to proceed with caution.
| Characteristics | Values |
|---|---|
| Air quality | Unhealthy or could be unhealthy |
| Air quality forecast | Above the federal health standard |
| Severity | More people may experience health effects |
| Symptoms | Irritation of eyes, nose, and throat, coughing, chest tightness, and shortness of breath |
| Action | Reduce prolonged outdoor exertion |
| Water conditions | Environmental hazards, pollution, or high bacterial counts |
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What You'll Learn

Air quality is unhealthy and above federal health standards
An orange flag is used to indicate a high pollution advisory. This means that the air quality is or could be unhealthy and is forecast to be above federal health standards. When the air quality is above federal health standards, it is important to take certain precautions to protect your health.
The effects of poor air quality can vary depending on the severity of the pollution. As a result, some people may begin to experience health issues. Common symptoms to look out for include irritation of the eyes, nose, and throat. You may also experience coughing, chest tightness, and shortness of breath. If you are experiencing any of these symptoms, it is recommended to take breaks and reduce prolonged outdoor exertion.
For those with asthma, it is important to follow your asthma action plan and keep quick-relief medicine close by. This is because air pollution can worsen asthma symptoms and trigger attacks.
To reduce the impact of poor air quality, it is advisable to opt for less intense outdoor activities, such as walking instead of running. Alternatively, you can move your activities indoors. Checking the air quality forecast will help you determine the level of estimated air pollution and the time of day when the air quality is expected to be at its worst.
It is important to note that the orange flag is part of the Flag Program, which is specifically designed for areas where air quality does not meet or is at risk of not meeting national standards. These areas must have air quality forecasts for ozone, PM10 (dust), and PM2.5 (smoke). By flying an orange flag, communities can quickly and effectively communicate the potential health risks associated with elevated levels of air pollution.
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Prolonged outdoor activity should be reduced
An orange flag is a warning that indicates high pollution levels. When an orange flag is flown, it means that air quality is or could be unhealthy and is forecast to be above federal health standards. As a result, it is recommended that prolonged outdoor activity should be reduced.
When exposed to elevated levels of air pollution, individuals may experience a range of symptoms, including irritation of the eyes, nose, and throat, coughing, chest tightness, and shortness of breath. To protect your health, it is advisable to limit your time outdoors and reduce strenuous physical activity.
For those who still wish to engage in outdoor activities, it is recommended to opt for less intense exercises, such as walking instead of running. If possible, consider moving your activities indoors to minimize exposure to polluted air. This is especially important for individuals with asthma, as air pollution can aggravate asthma symptoms and trigger attacks. Those with asthma should ensure they have their quick-relief medicine on hand during such times.
Additionally, it is important to stay informed about the air quality forecast. Check for the estimated time of the day when the air quality is expected to be at its worst and plan your activities accordingly. By taking these precautions, you can help reduce the potential health risks associated with high pollution levels indicated by the orange flag warning.
It is worth noting that the orange flag warning system is part of the Air Quality Flag Program, designed for specific areas where air quality is of concern or at risk of not meeting national standards. This program includes forecasts for ozone, PM10 (dust), and PM2.5 (smoke) levels. By following the flag program and staying vigilant about air quality updates, individuals can take the necessary steps to protect their health and well-being during periods of high pollution.
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Symptoms to watch out for: eye, nose, and throat irritation
An orange flag is flown to indicate a High Pollution Advisory (HPA). This means that air quality is or could be unhealthy and is forecast to be above federal health standards. When an orange flag is flown, it is recommended that you check the air quality forecast and watch for symptoms of pollution exposure, especially irritation of the eyes, nose, and throat.
When exposed to elevated levels of air pollution, the eyes, nose, and throat may become irritated. Airborne particles and chemicals in the air can cause eye irritation. For example, particulate matter, such as tiny dust particles, can physically irritate the eyes, leading to itching, burning, and redness. Chemical pollutants, such as nitrogen dioxide and volatile organic compounds (VOCs), can also trigger eye irritation. Prolonged exposure to air pollution can lead to eye problems such as conjunctivitis, commonly known as "pink eye". Conjunctivitis is a condition that occurs when the conjunctiva, the clear membrane covering the white part of the eye, becomes inflamed due to exposure to allergens, such as pollen, dust, and chemicals in polluted air. Symptoms of conjunctivitis include redness, itching, tearing, and swelling of the eyes.
In addition to eye irritation, elevated levels of air pollution can irritate the nose and throat. Nitrogen dioxide (NO2) is a common pollutant that can cause nose and throat irritation, in addition to other symptoms such as shortness of breath and increased susceptibility to respiratory illness. Tobacco smoke is another pollutant that can irritate the nose and throat and cause respiratory illness.
Other symptoms to watch out for when exposed to high levels of air pollution include coughing, chest tightness, and shortness of breath. It is important to take breaks, choose less intense outdoor activities, or move activities indoors to reduce exposure to air pollution. Additionally, using eye drops, such as artificial tears, can provide relief from pollution-induced eye irritation by soothing dryness and irritation.
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Asthma symptoms may worsen
An orange flag indicates a high level of pollution advisory, meaning that air quality is or could be unhealthy and is forecast to be above federal health standards. When exposed to elevated levels of air pollution, symptoms such as irritation of the eyes, nose, and throat, coughing, chest tightness, and shortness of breath may occur.
Indoor air pollution can also negatively affect asthma symptoms. Unflued gas heaters (UFGHs) are a significant source of indoor air pollution and have been associated with a worsening of asthma symptoms in both children and adults. A study found that the use of UFGHs led to a significant increase in respiratory symptoms such as wheezing and dyspnea. Similarly, a Brazilian study found that exposure to indoor air pollution was associated with poorer asthma control and a higher proportion of severe asthma cases.
To manage asthma effectively, it is crucial to avoid triggers, take preventive medications, and be prepared to treat asthma episodes. On days when air pollution levels are high, people with asthma should limit their time outdoors, especially during the late morning and early evening hours. It is also recommended to stay in a well-ventilated or air-conditioned building and refrain from strenuous outdoor activities.
By following these precautions and staying informed about air quality forecasts, individuals with asthma can proactively manage their symptoms and reduce the risk of asthma attacks during periods of high pollution.
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Orange flag is part of the Flag Program
The orange flag is part of the Flag Program, a system designed to inform the public about the air quality in specific areas. The program is implemented in locations where air quality does not meet or is at risk of not meeting national standards. These areas must also have air quality forecasts for ozone, PM10 (dust), and PM2.5 (smoke).
The Flag Program uses a colour-coded system to indicate the level of air pollution. The orange flag represents a "High Pollution Advisory" (HPA). When the orange flag is flown, it means that air quality is or could be unhealthy and is forecast to be above federal health standards. Those exposed to elevated levels of air pollution may experience irritation of the eyes, nose, and throat, as well as coughing, chest tightness, and shortness of breath.
The orange flag serves as a warning to take precautionary measures. It is recommended to check the air quality forecast to determine the estimated level of air pollution and the time of day when air quality is expected to be at its worst. During periods of high pollution, it is advisable to reduce prolonged outdoor exertion, take breaks, and opt for less intense outdoor activities, such as walking instead of running.
Additionally, individuals with asthma should be particularly cautious during orange flag conditions. Asthma symptoms may worsen, and attacks may be triggered. It is important for individuals with asthma to follow their asthma action plan and keep quick-relief medicine close at hand.
The orange flag is a visual reminder to be vigilant and take appropriate actions to protect one's health and well-being during periods of high pollution. It is important for individuals to stay informed and proactive in monitoring air quality and taking the necessary steps to mitigate the potential health risks associated with elevated pollution levels.
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Frequently asked questions
An orange flag is a warning of environmental hazards, such as pollution or high bacterial counts.
The Air Quality Flag Program is designed for areas where air quality does not meet or is at risk of not meeting national standards.
When an orange flag is flown, people should check the air quality forecast and watch for symptoms such as irritation of the eyes, nose and throat. It is also advised to reduce prolonged outdoor exertion.
The flag colours include orange, green, yellow and purple. An orange flag indicates environmental hazards or pollution. A green flag indicates low hazard and calm conditions. A yellow flag indicates moderate risks, such as medium surf or currents. A purple flag indicates the presence of dangerous marine life.
AQI stands for Air Quality Index. Each pollutant has an AQI value that corresponds to the level of the national ambient air quality standard for the protection of public health.











































