Health

Wildfires present serious health hazards that go beyond the immediate threat of fire. Exposure to intense heat can cause burns, ranging from minor redness to severe, life-threatening injuries.

Wildfires often coincide with heatwaves. This increases the risk of dehydration, heat exhaustion and heatstroke, particularly affecting those with pre-existing heart, lung or kidney problems.

Smoke from wildfires is a major health concern, carrying fine particulate matter and harmful gases. These gases can travel great distances and linger in the air for days. Breathing in this polluted air can irritate the eyes, nose and throat, worsen respiratory illnesses such as asthma, and raise the risk of cardiovascular problems. Vulnerable groups, including children, the elderly, pregnant women and those with chronic conditions, are especially at risk and should take precautions to reduce exposure.

The impact extends to mental health as well. The trauma and stress of such events can trigger anxiety, persistent worry, sleep difficulties and depression-like symptoms. It is vital to address these effects alongside physical injuries. People affected are encouraged to seek support from family, friends or healthcare professionals once they are safe.

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Burns

Exposure to heat from wildfires can cause skin burns of varying severity, depending on the depth of tissue damage.

  • First-degree burns affect the outer layer of the skin and may cause redness and pain.
  • Second-degree burns reach the second layer of skin and may cause swelling, red, white or splotchy skin. Blisters may develop and pain can be severe. Deep second-degree burns can result in scarring.
  • Third-degree burns extend into the fat layer beneath the skin. Affected areas may appear black, brown or white, and the skin may look leathery. These burns can destroy nerves, causing numbness.


Minor burns
can be treated by holding the affected area under cool running water for about 10 minutes. Do not break blisters. Remove rings or other tight items from the area before swelling occurs. After cooling, apply a lotion to prevent dryness and provide relief. Loosely cover the area with a clean bandage to protect blistered skin. If needed, take a pain reliever.

For major burns, seek immediate medical attention. While waiting for help:

  • Gently remove tight items, as swelling can occur quickly.
  • Loosely cover the burn with sterile gauze or a clean cloth.
  • If possible, raise the burned area above heart level.
  • Monitor for signs of shock, such as cool, clammy skin, weak pulse or shallow breathing. Seek assistance if necessary.

Smoke

Wildfire smoke, comprising gases and fine particulate matter (PM 2.5) can travel great distances and remain airborne for extended periods. These particles can penetrate deep into the lungs and enter the bloodstream, posing health risks even when wildfires are far away. Exposure may lead to symptoms  such as burning eyes, runny nose, coughing, shortness of breath and chest pain, and increases the risk of respiratory and cardiovascular diseases.

Certain vulnerable populations are particularly at risk. Children, with their developing airways and higher activity levels outdoors, are more susceptible to polluted air and its harmful particulates. Similarly, older adults face increased risks due to a higher risk of underlying heart and lung conditions. Respiratory or heart issues, such as asthma, heighten sensitivity to the adverse effects of smoke and may worsen existing health problems.

Pregnant women are also vulnerable, as physiological changes during pregnancy, such as increased breathing rates, can heighten sensitivity to smoke. This may lead to complications including preterm birth and low birth weight. Other at-risk groups include physically active people, those with severe mental health conditions, individuals with alcohol or drug dependence and people on certain medications. These groups should take extra precautions to minimise exposure during wildfire events. 

Wearing masks can help filter out harmful ultrafine particles, 0.3 microns (PM 0.3) or smaller, from smoke. Always check the filter rating to ensure suitability for wildfire conditions. If a dedicated mask is unavailable, a damp cloth can be used as a temporary measure, though it is not recommended for prolonged exposure to smoke or heat.

Wildfires often coincide with heatwaves, increasing the risk of dehydration, heat exhaustion and heatstroke, particularly affecting those with pre-existing heart, lung or kidney problems.

Mental Health

Like other traumatic events, experiencing a wildfire can lead to mental health symptoms, such as overwhelming anxiety, persistent worrying, difficulty sleeping and other depression-like symptoms. If experiencing an anxiety or panic attack near a wildfire, try to calm yourself by breathing slowly and focusing on responding appropriately to the situation, whether that involves finding shelter or moving to a safe area. Once out of danger, consider speaking with a family member, friend, counsellor or healthcare professional if you have any mental health concerns.

Heat

During summer, wildfires and heatwaves often occur simultaneously. The primary health risks from heatwaves include dehydration and heat exhaustion, with symptoms such as excessive thirst, fatigue, muscle cramps and dizziness. Prolonged heat exposure can also worsen cardiovascular, respiratory and kidney conditions, and may lead to heatstroke.

Respiratory or heart conditions, such as asthma, increase sensitivity to the adverse effects of heatwaves, potentially exacerbating existing health issues. Travellers can reduce their risk by staying well hydrated, wearing light and breathable clothing, and limiting outdoor activities during peak daylight hours.

Contributors:

Avantika Deb, Bumjoon Park and Sila Ceyhan

Editor:

Paul Mutter, Global Coverage Manager at Riskline

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