Vog (volcanic smog) is a visible haze comprised of gas and an aerosol of tiny particles and acidic droplets created when sulfur dioxide (SO₂) and other gases emitted from a volcano chemically interact with sunlight and atmospheric oxygen, moisture, and dust. It poses a health hazard by aggravating preexisting respiratory ailments. SO₂ gas can irritate the skin and the tissues and mucous membranes of the eyes, nose and throat, penetrate airways, produce respiratory distress in some individuals, and induce asthma symptoms.

If you are presently in an area affected by Vog, observe the following precautions and protective measures:

1. Check the air quality level daily. Through the Air Quality Management System page of the Department of Environment and Natural Resources (DENR) website: https://air.emb.gov.ph/ambient-air-quality-monitoring/

2. Limit outdoor activities to what’s essential. Stay indoors to reduce exposure to vog and keep your doors and windows closed. If possible, run an air-conditioner or air purifier; both will remove the particulate sulfur compounds and acid gases from your indoor air.

3. Avoid physical activity when vog levels are high.

4. Mask up. When heading out is necessary, make sure to wear an N95 or KN95 face mask. If an N95 or KN95 mask is unavailable, a surgical mask may be used as a last resort. Regardless of outdoor activity, high-risk groups such as the elderly, pregnant, or those with asthma, lung, or heart disease, are advised to mask up. Ensure that the mask is properly fitted to form a seal around your nose and mouth.

5. Stay hydrated. Drink water regularly to help against throat irritation and nasal congestion caused by vog.

6. Avoid smoking, vaping, or using candles and essential oils as any of these may further compromise the air quality around you.

7. Keep your emergency kit on hand. Make sure to stock up on medications for allergies, asthma and flu. 

8. Seek immediate medical attention when deemed necessary, particularly for serious symptoms like difficulties in breathing, increased coughing or chest tightness.

Keep safe, Warriors!