Knowledge Building Series:
Climate Change, Human Health and Welfare
Untied States
Eirrviirai»meotal Protection
Agency
Part 3 of 3
U.S. ENVIRONMENTAL PROTECTION AGENCY REGION 8
Can Climate Change Affect my Health and Welfare?
Climate change is already influencing our physical environment in the Mountain West
and Great Plains states and the affect on people's health and welfare is expected to
progressively increase as greenhouse gases continue to buildup in the atmosphere. We
will experience high temperatures, extreme weather events, the spread of disease,
drought, and other impacts. Many climate impacts are expected to increase in severity.
It is important for us to be prepared, focus on adapting to these changes and address
the impacts on vulnerable populations, including children, the elderly and the poor, who
will be disproportionately impacted.
(Source: U.S. Global Change Research Program (USGCRP)—Global Climate Change Impacts in the
United States)
2009
The global
average
temperature
since 1900 has
risen
by about 1.5°F.
By 2100, it is
projected to
rise another 2
to 11.5°F"
-USGCRP pg. 9
What Health Impacts Can We Expect?
Climate change will have different impacts across the United States due to geographic
and cultural differences. In the Mountain West and Great Plains, the following impacts
are anticipated:
Environmental and Health Issues
Extreme Heat and Heat waves
Poor Air Quality
Increased ground-level ozone
(a component of smog)
Floods
Wildfires
Disease Transmission through food,
water and insects
Increased Allergenic Pollen
Possible Impacts
Increased illnesses like heat exhaustion and
kidney stones; increased mortality particularly in
urban areas where temperatures can be 1 0°
warmer
Short-term harm to lungs, damage to lung cell
lining, increased cases and deaths caused by
asthma
Flood related injuries, increased waterborne
disease, and contaminated drinking water
Eye and respiratory illness due to air pollutants,
direct injuries and burns that could potentially
lead to death
Increased likelihood of food-borne diseases due
to Salmonella and other bacteria; cases of
Giardia and Cryptosporidium in drinking and
recreational waters after heavy downpours;
mosquitos, ticks and rodents carry West Nile
virus, equine encephalitis, Lyme disease, and
hantavirus
Prolonged allergy season
(Source: USGCRP Report, pgs. 90-96)
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Taking Action - What Can I Do?
Successful climate adaptation relies on research and education. It is critical that individuals use this knowledge to
change behavior and become aware of how to adapt to the impacts of climate change.
(Source: USGCRP Report-Concluding Thoughts)
How to Beat the Heat
• Drinking plenty of non-carbonated liquids like water or electrolyte-enriched
drinks, even when you don't feel thirsty.
• Avoid alcohol, caffeine or drinks with a lot of sugar because they help speed up
fluid loss.
• Stay indoors, preferably in air-conditioned areas like malls and movie theaters.
Even a few hours can help cool your body's temperature.
• If you feel very hot, cool off by taking a cool bath or shower. Opening a window
or using a fan may not prevent heat-related illness. Do not try to cool children in
ice water or alcohol baths.
• Wear lightweight, light-colored, loose fitting clothing. Wear a hat or use an um-
brella, and put on sunglasses.
• Limit physical activity to morning and evening hours. Avoid physical activity be-
tween 1 0 am and 3 pm, the hottest part of the day.
• Check on older adults, infants and young children frequently.
(Source: County of Santa Clara Public Health Department)
How to Prevent Mosquito Bites- The 4 D's
Dawn/Dusk: Avoid being outside at these times
because this is when mosquitoes are most active
Drain: Get rid of standing water in your back-
yard. Be sure to drain water from old tires, flower
pots and clogged gutters. These are breeding ar-
eas for mosquitoes. Change water in bird baths
weekly to keep it fresh.
DEET: Use a bug repellent with DEBT when outside. Use
lower concentrations on children. Other options are avail-
able and approved by the Center of Disease Control
and Protection. These repellents should contain picaridin
and lemon or eucalyptus oil.
Dress: Wear loose fitting, lightweight, and long sleeved
clothes. To get extra protection, spray clothes with insect
repellent.
(Source: Colorado Department of Health)
Mosquitoes and West Nile
As temperatures increase, the range of disease-carrying mosquitoes will
spread further northward. For example, West Nile Virus requires a minimum
temperature of about 58 °F for development, and longer seasons with
warmer summers may expand the territory of disease carrying mosquitoes.
(Source: Re/sen W, Brault AC. West Nile virus in North America: perspectives on epi-
demiology and intervention. Pest Manag Sci. 2007 Jul;63(7):641-6)
In the summer of 1999, a new strain of West Nile Virus emerged in North
America. The highest transmissions of this virus were during the summers of
2002 to 2004 in the U.S. and were linked to above-average temperatures.
(Source: Journal of Medical Entomology, (43(2), 309-317)
Page 2
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The Heat is On
Heat is already the leading cause of
weather-related deaths in the United
States. More than 3,400 deaths between
1999 and 2003 were reported as result-
ing from exposure to excessive heat.
The number of days in which the tem-
perature exceeds 100°F by late this cen-
tury, compared to the 1960s and 1970s,
is projected to increase strongly across
the United States. For example, parts
of Texas that recently experienced
about 10 to 20 days per year over 100°
F are expected to experience more than
100 days per year in which the tem-
perature exceeds 100°F by the end of
the century under the higher emissions
scenario.
(Source: USGCRP Report, pg. 90)
Who is at Risk?
According to the USGRCP Report, infants, children, pregnant
women, elderly, those with chronic medical conditions, outdoor
workers, and the impoverished are the most at risk from climate re-
lated health effects.
Vulnerable Group
Children
Poor
Elderly
Diabetes
Why They Are Vulnerable
Small ratio of body mass to surface area,
increased breathing, extra time spent outside,
developing respiratory tracts, and immature
immune system
Lack of proper shelter, air conditioning and
other vital resources
Likely to have debilitating chronic disease,
lack of mobility, high sensitivity to heat,
greater risk of heart failure, blood pressure
medications can increase chances of
dehydration
Fluid imbalance and dehydration make heat
waves more dangerous, heart disease com-
bined with diabetes increases chances of
mortality during heat waves
(Source: USGCRP Report, pg. 97)
What You Can Do to Decrease Ozone
• Drive less and use public transportation
• Carpool
• Ride your bike
• Make sure that your car is constantly meeting maintenance requirements
• Keep chemicals and cleaning products well-sealed in order to avoid evaporation
(Source: A/rNow, hftp://airnow.gov/index.cfm?action=health2.smog 1#1)
Page 3
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Knowledge Building Series:
Climate Change, Human Health and Welfare
U.S. ENVIRONMENTAL PROTECTION AGENCY REGION 8
EPA Climate Change Information
Region 8 Climate Change Website
http://www.epa.gov/region8/
climatechange/
EPA National Climate Change Website
http://www.epa.gov/climatechange/
Regional Climate Change
Coordinator
Laura Farris
US EPA Region 8 / MC 8P-SA
1595 Wynkoop Street
Denver, CO 80202-1129
farris.laura@epa.gov
303-312-6388 phone
303-312-6341 fax
For More Information
Intergovernmental Panel on Climate Change
http://www.ipcc.ch/
National Center for Atmospheric Research
http://www.nca r.uca r.ed u/resea rch/climate/
Centers for Disease Control and Prevention
http://www.cdc.gov/climatechange/
U.S. Climate Change Science Program
http://www.climatescience.gov/
World Health Organization Global Change
http://www.who.int/globalchange/en/
Adaptation Resources
Extreme Heat
http://www.epa.gov/heatisland/about/heatguidebook.html
Wildfires
http://www.epa.gov/region09/naturalevents/wildfire/
Severe Drought
http://www.epa.gov/naturalevents/drought.html
Flooding
http://www.fema.gov/hazard/flood/index.shtm
"Adaptation to current
climate variability can also
increase resilience to
long-term climate change.'
-Intergovernmental Panel on
Climate Change
Reference: Global Climate Change Impacts in the United States, Thomas R. Karl, Jerry M. Melillo, and Thomas C. Peterson, (eds.). Cam-
bridge University Press, 2009.
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