Wildfire smoke is not dangerous only near the flames. It can travel long distances, reduce air quality in cities and islands and affect people who cannot see the fire itself. The main concern is a complex mixture of gases and particles, especially very small PM2.5 particles that can travel deep into the lungs.

The smell of smoke is a warning but not a reliable measure of risk. Particle concentrations may remain high even when the smell appears weaker. Official air-quality information and civil-protection instructions take priority.


What smoke inhalation can cause


In the short term, smoke may cause stinging eyes, throat irritation, coughing, wheezing, headache, breathlessness and chest tightness. It can worsen asthma, chronic obstructive pulmonary disease and cardiovascular disease.

Fine particles are not stopped completely by the nose and throat. They penetrate deeper into the respiratory system and can trigger inflammation. Effects depend on concentration, duration, physical exertion and underlying health.


Who needs greater protection?


Children, older adults, pregnant people and individuals with asthma, COPD, heart disease or other chronic conditions are more vulnerable. Outdoor workers and people exercising heavily inhale a larger volume of air and therefore a greater quantity of particles.

Pets are also affected and should not remain outside when air quality is poor. Walks should be limited to what is necessary, following veterinary and local advice.


Reducing smoke indoors


When smoke affects the area, close doors and windows and limit the intake of outdoor air. If an air conditioner is used, select recirculation when this is possible and safe for the system. An appropriately sized air cleaner with a HEPA filter can reduce particles in one enclosed room.

Avoid activities that add indoor pollution, including smoking, candles, frying without adequate ventilation and heavy use of sprays. If the home cannot maintain cleaner, cooler air, follow official advice about moving to a safer location.


Which mask helps?


A well-fitting FFP2 or N95 respirator can reduce inhalation of fine particles when going outside is necessary. Fit is essential: gaps around the nose and cheeks allow air to bypass the filter.

Simple surgical or cloth masks do not provide the same level of PM2.5 protection. Particle respirators do not protect against every gas in smoke and cannot make it safe to remain near a fire. During hot conditions, a respirator adds strain during physical exertion, so limit activity and take breaks in a cool, clean-air space.


Medication and an action plan


People with asthma or COPD should keep their usual medication available and follow the written action plan provided by their clinician. Do not increase doses without guidance or use another person's inhaler. Sufficient medication, a charged phone, water and an evacuation plan should be prepared in advance.

Never delay an official evacuation order to protect property or collect possessions. Immediate danger from fire and hot gases overrides air-quality measures.


When urgent help is needed


Severe breathlessness, blue or grey lips, chest pain or pressure, confusion, fainting, inability to speak in full sentences or an asthma attack that does not respond to the personal action plan require an immediate emergency call. Persistent coughing, wheezing or worsening chronic disease require medical advice. https://healthpont.com/wildfire-smoke-how-does-it-affect-the-body-and-which-mask-offers-protection/