Warmer, drier conditions raise risk of summer health hazards
Find resources to help manage risks of harmful algal blooms, wildfire smoke, mosquitoes, ticks, and more
As the summer season approaches with unusually low snowpack and the potential for above-average temperatures, the Department of Health and Welfare (DHW) is reminding Idahoans that summer fun can also include seasonal health hazards to be aware of.
Predictions from the National Weather Service’s Climate Prediction Center and the National Interagency Fire Center indicate that most of Idaho is expected to have above normal temperatures and below normal rain through the end of July. In addition, Idaho will likely have above normal wildland fire activity during July and August. Northern California, eastern Oregon, and eastern Washington, all of which are upwind of Idaho, have above normal wildland fire outlooks from June through August, which could contribute to smoky air in the Gem state even if there are no active fires in Idaho.
“Idaho’s summers bring incredible opportunities to get outdoors, but they also come with some risks,” said Dr. Christine Hahn, state physician and epidemiologist in the Division of Public Health. “Awareness and a few simple precautions can help keep individuals and families safe.”
As you enjoy Idaho’s beautiful outdoors this summer, keep in mind the following items to stay healthy.
Harmful algal blooms
Cyanobacterial harmful algal blooms (CyanoHABs) can form in lakes, reservoirs, and slow-moving rivers. Blooms can produce toxins that can make both people and animals sick. HABs can cause skin irritation, stomach illness, and more serious health effects, especially in pets and livestock. DHW partners with the Idaho Department of Environmental Quality to map out active HABs and other water advisories statewide. Check the map for current HABs impacting your area.
Wildfire smoke
Wildfire smoke can travel hundreds of miles and affect air quality in communities far from an active fire. Smoke contains fine particles that can irritate the eyes and lungs. Older adults, young children, pregnant women, outdoor workers, and people with existing health conditions are especially vulnerable to smoke in the air. Limit strenuous outdoor activity when smoke levels are high.
Check the Idaho Smoke Blog for current air quality advisories and wildfire information and Idaho air quality index
Heat-related illness
When temperatures soar, consider taking simple precautions like avoiding being outside during the heat of the day, finding air conditioning in a public place, and wearing loose, light-colored clothing. Also, never leave your children or pets in the car, even for a few minutes. For more about how to protect yourself and your family from the dangers of extreme heat, visit the Centers for Disease Control and Prevention's (CDC) overview about how to protect from the dangers of extreme heat.
Swimming safely
Enjoy the warmer months by playing it safe while in the water with your friends and family. There are great resources at the CDC website related to staying healthy while swimming in pools and bodies of water and playing at splash pads.
Canals are a tempting place to cool off because they are often convenient to access, but they are also very dangerous. They range in depth between 1 and 10 feet, and many have steep, vertical banks made of smooth concrete that can be slippery and make getting out difficult. No adult, child, or pet should ever swim or play near a canal. More children drown in canals than any other body of water in Idaho.
Follow this link for more tips and resources for safe swimming from the CDC.
Summer travel
Measles and other outbreaks are occurring in parts of the United States and internationally. Health experts recommend getting needed vaccines at least a month before travel to allow immunity to build, though last-minute vaccination can still provide benefits.
- Adult immunization schedule from CDC: https://www.cdc.gov/vaccines/hcp/imz-schedules/downloads/adult/adult-combined-schedule.pdf
- Travel information from CDC: https://wwwnc.cdc.gov/travel/destinations/list
Infectious diseases
West Nile virus spreads through the bite of infected mosquitoes and can cause serious illness, particularly in older adults. Follow this link for more information about West Nile virus from DHW.
Rocky Mountain spotted fever isa rare but serious bacterial illness spread by wood ticks. Seek immediate medical care for a sudden fever, headache, or rash after outdoor activity. Quick treatment is life-saving. Follow this link for more about Rocky Mountain Spotted fever from CDC.
Rabies is a rare but nearly always fatal disease without timely treatment. In Idaho, it is most commonly associated with bats. Follow this link for more information from DHW about rabies.
DHW will continue to monitor conditions throughout the summer and issue public health advisories as needed. They will be posted at healthandwelfare.idaho.gov.
The Idaho Department of Health and Welfare is dedicated to strengthening the health, safety, and independence of Idahoans. Learn more at healthandwelfare.idaho.gov.
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