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Frequently Asked Questions Regarding Public Health and Wildfire Smoke

Post Date:08/08/2018 4:34 PM

Frequently Asked Questions Regarding Public Health and Wildfire Smoke

As California wildfire season continues, residents are asking about air pollution in affected areas.

Q: Is wildfire smoke a threat to my health?
Smoke from wildfires is a mixture of gases and fine particles from burning trees and
other plant materials. It can irritate your eyes or your respiratory system, and worsen
chronic heart and lung diseases. How much and how long you are exposed to the smoke,
as well as your age and degree of susceptibility play a role in determining whether or not
you will experience smoke-related health problems. If you are experiencing serious
medical problems for any reason, seek medical treatment immediately.

Q: How can I tell if the smoke is affecting my family or me?
Smoke can cause coughing, scratchy throat, irritated sinuses, shortness of breath,
chest pain, headaches, stinging eyes and runny nose. If you have heart or lung disease,
smoke might make your symptoms worse.

  • People who have heart disease can experience chest pain, rapid heartbeat, shortness
    of breath and fatigue.
  • Smoke can worsen symptoms for people who have respiratory conditions, such as
    respiratory allergies, asthma, and chronic obstructive pulmonary disease (COPD), in the
    following ways:
    - Inability to breathe normally
    - Cough with or without mucus
    - Chest discomfort
    - Wheezing and shortness of breath
  • Persons who have asthma, emphysema, or other respiratory diseases should use their
    maintenance puffers/inhalers as directed and carry their rescue inhaler if leaving home.
  • When smoke levels are high, even healthy people may experience some of these

Q: How can I protect myself and my family from the harmful effects of smoke?
A: The best thing to do is to limit your exposure to the smoke. Specific strategies to
decrease exposure to smoke include staying indoors whenever possible, using air
conditioners (air conditioned homes usually have lower air exchange rates than homes
that use open windows for ventilation), using mechanical air cleaners, keeping windows
closed while driving in a vehicle, and minimizing other sources of air pollution such as
smoking tobacco, using wood burning stoves, burning candles or incense and vacuuming.
It is also important to stay hydrated by drinking plenty of water or caffeine-free non-sugary

Q: Should I wear a dust mask or N95 respirator?
Dust masks and surgical masks do not reduce our exposure to particulate pollution.
N95 or N100 masks, technically called respirators, can reduce inhalation of smoke
particles if they fit properly, which means tightly. Leaky masks do not provide much
protection. Properly fitting N95s are a bit hard to breathe through and are not practical
for use over many hours or days. It is also important to know that N95 particulate
respirators and dust masks only filter particles, not toxic gases and vapors that are
found in smoke.

N95 respirator masks can make the work of breathing more difficult and can lead to
increased breathing rates and heart rates. They can also contribute to heat stress.
Because of this, respirator mask use by those with heart and respiratory diseases can
be dangerous, and should only be done under a doctor’s supervision. Even healthy
adults may find that the increased effort required for breathing makes it uncomfortable
to wear a respirator mask for more than short periods of time.

Most people find it difficult to use the respirator masks correctly for general use. For
instance, it is impossible to get a good seal on individuals with facial hair. As a result,
the respirator will provide little if any protection, and may offer the wearer a false
sense of protection. While respirator masks are useful during cleanup of ash, during
long-term smoky conditions, the risks are greater than the potential benefits. The best
and safest decision you can make is to stay indoors as much as possible. If you must
use a respirator mask in an occupational setting, you must be medically screened and
fit tested within the last year prior to use. The state health department has information
about N95 masks:

Q: What is the difference between an N95 respirator and dust mask?
N-95 respirator masks are tested and approved by the National Institute of
Occupational Safety and Health (NIOSH) for use in certain work places. The respirator
masks are tested to filter particles efficiently and are likely to filter small particles like
those found in smoke more effectively than dust masks which have not been tested. If
an employer requires an employee to wear a respirator, the employee must be fitted
and trained to wear a respirator mask and may only use a NIOSH approved respirator.

Q: Will a wet towel or bandana provide any help?
A wet towel or bandana may provide some help but it will be very limited. Since wet
towels or bandanas may not be sealed to the face and their capacity to filter very small
particles is unknown, they will likely provide little protection.

Q: What should I do if I must drive to work?
Individuals can reduce the amount of smoke particles in their vehicles by keeping the
windows closed and using the air conditioner. The car’s ventilation systems typically
remove a portion of the particulate coming in from outside. For best results, individuals
may also want to use the re-circulate air feature found in most cars, which will help keep
the particulate levels lower.

Q: Our community has an outdoor game or practice scheduled for today, should
we cancel it?
All persons in areas affected by wildfire smoke are advised to limit outdoor activity
and stay indoors when air quality reaches the unhealthy level to minimize exposure to
the smoke. Contact your local sports association officials for more guidance and
monitor the local Air Quality Index:

Q: Do air-purifying machines help remove smoke particles inside buildings?
Some air cleaners may be effective at reducing indoor particle levels, but most are
not effective at removing gases and odors. For additional information consider
reviewing the US Environmental Protection Agency document: “Ozone Generators That
Are Sold As Air Cleaners” available at:
Humidifiers or de-humidifiers are not technically air cleaners and will not significantly
reduce the amount of particles in the air during a smoke event.

Q: What should I do about closing up my house when it is so hot inside?
If you do not have an air conditioner and if it is too warm to stay inside with the
windows closed, seek alternative shelter by visiting family members or neighbors who
have air conditioning. You may also be able to visit an air conditioned location, such as
a library, for a few hours.

Q: If I have respiratory problems and can’t reach my doctor, where should I go?
If you have a medical emergency you should call 911 or go to the hospital
emergency room immediately.

Q: I operate a nonresidential building with outside air intakes. Should I close the
outside air intakes during a wildfire smoke event?
Every nonresidential building has a uniquely designed ventilation system where any
changes even temporary ones, can have an impact on building occupants and indoor
air quality. If your building is strictly an office environment it may be wise to cut back or
eliminate outside intake into the building during a wildfire smoke event. However, if the
building has labs or special ventilation systems, consult a heating, ventilation and air conditioning
professional who knows your special ventilation needs to determine if
altering the airflow presents a greater danger.

Q: Where can I find information about the air quality in Amador County?
A: The Amador County Air Resources Board has placed air quality sensors throughout
the county to provide real time air quality monitoring. You can access this information by
visiting the following website:

Stay connected to social media and news sources. It is important to monitor and comply
with government issued warnings to remain as safe as possible.
Amador Public Health Social Media:

Twitter Feed: @AmadorHlthDept ,

Printable FAQFrequently Asked Questions Regarding Public Health and Wildfire Smoke

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