By Brenda Goodman, MA
WebMD Health News
Reviewed by Brunilda Nazario, MD
Nov. 16, 2016 -- People living across the southeastern U.S. have been dealing with an unfamiliar health threat in recent days: a thick haze of smoke that's drifted from more than 30 wildfires burning in the Tennessee Valley and southern Appalachian Mountains.
Latest Lungs News
On Wednesday, the EPA's AirNow monitor showed a red swath of unhealthy air that stretched from West Virginia to south Georgia. A red alert has been issued for the area, meaning even healthy people may experience problems because of poor air quality. Sensitive people -- like children, the elderly, and those with asthma and heart disease -- are at even greater risk.
Hospitals in Tennessee, Georgia, and South Carolina say more patients are seeking help for breathing problems related to the smoke.
Chattanooga, TN, has been especially hard-hit. More than 200 people there have been hospitalized for shortness of breath and breathing problems due to the wildfire smoke since November 11, says Dean Flener, a Tennessee Emergency Management Agency spokesman.
In Atlanta, where aerial photographs show the city's downtown buildings shrouded in thick smoke at times, doctors also say they've seen more patients who are struggling to breathe.
"We've seen a big increase in the number of respiratory complaints coming in, specifically with people who have preexisting conditions like asthma," said Hany Atallah, MD, chief of emergency medicine at Grady Health System. He says the hospital is considering setting aside a separate area to treat those with breathing problems.
In South Carolina, Spartanburg Regional Healthcare System says it's seen sporadic increases in people seeking emergency care for breathing problems related to the smoke, spokeswoman Jessica Pickens says.
Wildfire smoke contains cancer-causing chemicals like benzene, formaldehyde, and carbon monoxide. It also contains fine particles -- about 60 times smaller than the width of a human hair -- that can lodge deep in the lungs. The particles irritate the lining of the respiratory tract, causing the airways to narrow. This causes coughing, wheezing, and shortness of breath, especially in people who already have lung problems. The particles can also block the immune system from clearing other invaders like pollen and bacteria, making even healthy people more likely to get sick.
No Letup Expected Soon
Climatologists and forestry officials warn the situation could continue for weeks because of an ongoing drought and the remoteness of the terrain where the fires are burning.
"We're preparing to be in this situation through Christmas," said Dave Martin, deputy director of operations for Fire and Aviation Management at the U.S. Forest Service Southern Region, in Atlanta.
The largest fire, Rough Ridge, burning in North Georgia's Cohutta Wilderness, has torched more than 23,000 acres and is only 30% contained. Winds have carried the smoke as far as Augusta, 200 miles southeast.
The fire, caused by lightning in mid-October, is burning in a part of the state that's having extreme and even exceptional drought, according to the U.S. Drought Monitor.
The normally dry conditions in November have been made worse this year by a high-pressure system that's been parked in the middle levels of the atmosphere. That system is blocking moisture from the Gulf of Mexico from reaching the Southeast, said Georgia State Climatologist Bill Murphey, PhD.
The fires have also ignited in the middle of leaf fall, so parts of the forest that have burned can reignite as leaves drop from trees.
The dry conditions have also made this an exceptionally smoky fire season, Martin says.
"The drier, the fluffier the leaf litter, you definitely get a thicker smoke layer," he says.
Public health officials are urging people, especially children, the elderly, and those with heart or lung conditions, to take precautions, including:
- Check local air quality reports. You can see your current local conditions at AirNow.gov.
- Use common sense. If it smells or looks smoky outside, limit outdoor activities like yard work and exercise. That's especially true for kids, since children breathe more air per pound of body weight than adults.
- Keep indoor air as clean as possible. Close doors and windows. Make sure your air filters on heating or air conditioning systems have recently been changed. Keep the fresh air intake closed. Avoid burning candles, fireplaces, and gas stoves, which can increase indoor air pollution.
- If you have asthma, keep your medicines handy and take them as directed.
- If you have heart disease or other pre-existing conditions, call your doctor if you have new or unusual symptoms.
- Don't rely on ordinary dust masks for protection. The paper masks sold at hardware stores can't screen out fine particles.
- Evacuate if you're in the immediate path of a fire.
In Atlanta at the start of this week, the number of fine particulates drifting through the air measured 153 micrograms per cubic meter.
"That's pretty darn high," says John Balmes, MD, who studies the health effects of air pollution at the University of California, Berkeley. "That's 5 times higher than what EPA would like to see in a 24-hour period."
And it's not likely to change much anytime soon.
"I don't really see any major rainmaking systems on the near horizon," Murphey says.
SOURCES: Dean Flener, executive officer for external relations, Tennessee Emergency Management Agency, Nashville. Hany Atallah, MD, chief of emergency medicine, Grady Health System, Atlanta. Jessica Pickens, spokeswoman, Spartanburg Regional Healthcare System, Spartanburg, SC. Dave Martin, deputy director of operations, Fire and Aviation Management, U.S. Forest Service Southern Region, Atlanta. Bill Murphey, PhD, Georgia State Climatologist, Atlanta. John Balmes, MD, director, Joint Medical Program; vice division head, Environmental Health Sciences; professor, Environmental Health Sciences, University of California, Berkeley, School of Public Health. EPA: AirNow.
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