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Firefighter

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What should I know before reading about this occupation?

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This profile summarizes the common issues and duties for firefighters. Firefighters may be called to any number of settings or workplaces. It is impossible to predict all of the possible hazards a firefighter may encounter. The demands of fire fighting can be sporadic and unpredictable with intermittent periods of intense physical and psychological stress. This summary focuses on the major job duties of primarily structural firefighters. For more information specific to wildland firefighters, please see the OSH Answers Wildland Firefighter.


What, briefly, does a firefighter do?

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Main duties of a firefighter include:

  • Respond to fire alarms, incidents (automobile, industrial, aviation, etc.), building collapses, acts of nature (tornadoes, floods, etc.) and other emergencies.
  • Rescue individuals in need of assistance.
  • Control fire using various equipment and methods (axes, water, chemical extinguishers, ladders, vehicles, boats, etc.).
  • Provide first aid.
  • Provide safety education to the public.

Specialized teams may be organized to respond to emergencies involving specific hazardous products or situations.


What are some health and safety hazards associated with being a firefighter?

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  • While helping individuals, there is possible exposure to contagious and infectious diseases, including blood-borne diseases such as AIDS, hepatitis B and C.
  • Exposure to various combustion products. The toxicity of smoke depends greatly on the fuel (the materials or chemicals being burnt), the fire's heat, and the amount of available oxygen for combustion. Common combustion products include:
  • Oxygen depletion -  Hypoxia (the condition caused by little or no oxygen in the air) can result in a loss of physical performance, confusion, and inability to escape.
  • Exposure to other chemicals, products, pharmaceuticals, and medicines, including opioids. 
  • Working with compressed gases (e.g., self-contained breathing apparatus).
  • Situations where physical demands involve very strenuous work, force, repetition, awkward postures and prolonged activities, often under extreme conditions, including:
  • Wearing heavy equipment, self-contained breathing apparatus (SCBA), and personal protective equipment, which may require more effort to perform the same tasks.
  • Heat stress.
  • Excessive noise levels.
  • Ultraviolet radiation.
  • Extreme temperatures (both cold and heat).
  • Unpredictable working conditions.
  • The danger of driving at high speeds, often in difficult traffic or weather conditions.
  • When responding to a fire emergency, there are many situations (e.g., the fire itself, structures breaking, unstable floors, and falling objects) where there is a risk of injury.

Fires can also create dangerous situations, such as:


Are there any long-term health effects of being a firefighter?

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Yes. The International Agency for Research on Cancer (IARC) has evaluated the carcinogenicity of occupational exposure of a firefighter as carcinogenic to humans (Group 1) based on sufficient evidence for cancer in humans. IARC concluded that there was:

  • sufficient evidence for the following cancer types: mesothelioma and bladder cancer.
  • limited evidence for the following cancer types: colon cancer, prostate cancer, testicular cancer, melanoma of the skin, and non-Hodgkin lymphoma.

Firefighters may be exposed to many carcinogens, including:

  • Building materials such as asbestos.
  • Chemical flame retardants.
  • Combustion products such as polycyclic aromatic hydrocarbons (PAHs).
  • Crystalline silica.
  • Diesel engine exhaust. 
  • Heavy metals such as cadmium and lead.
  • Per- and polyfluoroalkyl substances (PFAS) in foams and bunker gear.
  • Benzene.

For more information, please see the tip sheet, Occupational Cancer Awareness and Prevention in the Fire Service

Firefighters also develop:

  • back injuries and other strains.
  • diseases such as AIDS and hepatitis.
  • cardiovascular disease due to a multitude of toxic substances when fighting a fire. For example, carbon monoxide exposure is directly linked with cardiac toxicity.

What are some general safe work practices to know?

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Firefighters will need to know:

All workers should:


Where can I get more information?

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Because of the wide variety of situations in which a firefighter may work and the vast range of activities and materials encountered, all situations cannot be covered in this document.

NOTE: If you have health concerns, ask your doctor or medical professional for advice.

If you have any questions or concerns about your specific workplace, you can ask one or more of the following for help:

General information is available in OSH Answers or through the CCOHS person-to-person Safety InfoLine's Inquiries Service.


What should be included in an emergency preparedness and response plan for firefighters?

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Emergency response plans help prepare for unforeseen situations that may occur during a response, such as explosions, injuries, medical emergencies, and other crisis situations. 

For firefighter organizations, an emergency response plan may include:

  • Procedures for alerting workers in case of an emergency.
  • Rescue protocols for injured or trapped workers.
  • Worker evacuation procedures and designated assembly locations.
  • Contact information for key personnel.
  • First aid and medical assistance.
  • Measures for preventing workplace violence.
  • Worker training and drills.

The plan should be tailored to your organization, the unique challenges of a remote environment, and changing fire conditions. 


  • Fact sheet last revised: 2026-03-11

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