Harmful effects of wildfires towards the human and environments

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Wildfires are escalating worldwide in terms of intensity, magnitude, and length of time, which emphasizes the importance of comprehending the health impacts of wildfire exposure. Wildfire susceptibility increases in arid circumstances, such as dryness, extreme temperatures, and strong winds.

Wildfire smoke consists of a combination of dangerous air contaminants, including PM2.5, NO2, ozone, aromatic hydrocarbons, and lead. Wildfires not only pollute the air with harmful chemicals, but they also have a concurrent impact on the climate by emitting significant amounts of CO2 and other greenhouse emissions into the climate.

Due to a warming climate, which causes higher temperatures and less rainfall, and the urbanization process of rural regions, the duration of the peak fire season is extending, with an earlier beginning and an extended end. Wildfire occurrences are becoming increasingly severe in terms of the amount of land burned, the length of time they last, and their severity. Furthermore, they have the potential to impair connectivity, transportation, and accessibility to water, as well as electricity and fuel services.

Impact of Wildfires

Wildfires occurring in close vicinity to urban areas can cause substantial consequences for property, the ecosystem, animal husbandry, and human health and death. The severity of these impacts is determined by factors such as the magnitude and pace of the fire, its closeness to the people, and whether or not prior notification is given to escape.

Wildfire smoke is a blend of air pollutants, with particle matter (PM) being the primary concern for public health.

Wildfire smoke containing PM2.5 is linked to premature mortality in all populations and can contribute to the development and worsening of several health conditions affecting the heart, lungs, brain/nervous system, skin, gut, kidney, eyes, nose, and liver. Furthermore, research has demonstrated that it can result in cognitive impairment and memory decline. Firefighters and rescue professionals are significantly affected by wounds burns, and breathing in of smoke, especially when it is present in high quantities.

Further multidisciplinary research is necessary to comprehend the hidden and enduring health consequences of wildfire exposure on susceptible populations (such as children, older individuals, pregnant individuals, and those with chronic illnesses), especially in regions that experience repeated and cyclical exposure to these wildfire incidents.

WHO’s Guidelines

The severity of the physical and human toll caused by wildfires can be diminished if appropriate measures for emergency prevention, readiness, response, and recovery are implemented in a sustainable and timely fashion.

Collaborating with Member States, the World Health Organization (WHO) assists in developing robust and proactive healthcare systems that can predict and address emergencies, so increasing the likelihood of mitigating risks and responding efficiently when necessary.

WHO collaborates with partners to effectively prepare for, prevent, identify, respond to, and recover from emergencies and disasters, including environmental exposures, such as:

  • Deploying early warning systems and issuing advice regarding health and air quality; Restraining the release of dangerous substances;
  • Evaluating the health requirements of the population and the extent of infrastructure damage;
  • Reestablishing essential healthcare services such as vaccines, child and maternal health, and mental health support;
  • Enhancing the capacity of personnel involved in disaster management;
  • The tasks include gathering, examining, and distributing data concerning potential emergencies and disasters in a specific area;
  • Establishing and overseeing inventories of relief resources and equipment;
  • Requesting emergency funding to support healthcare efforts; and
  • Formulating national policies, recommendations, and plans for responding to emergencies

Further readings:

https://www.wri.org/insights/global-trends-forest-fires
https://www.unep.org/resources/report/spreading-wildfire-rising-threat-extraordinary-landscape-fires
https://fireecology.springeropen.com/articles/10.1186/s42408-022-00162-3

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