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Dr. Meredith Chiasson, a respirologist at the Halifax Infirmary, said in an interview Wednesday that drifting smoke poses problems for specific people, including those with heart and lung problems and those who deal with chronic health issues such as asthma.

Chiasson said pregnant women, older adults and children are also a concern in such conditions.

鈥淚t鈥檚 not a good idea to be spending a great deal of time outdoors in these conditions,鈥� she said. 鈥淵ou still see people out exercising, which I cringe at. Our lungs are very vulnerable so any damage that鈥檚 done from prolonged inhalation of these small particles that we find in the smoke could cause permanent damage.鈥�

While people closest to the fire need to be cautious, Chiasson noted that weather conditions and winds can carry the effects of smoke great distances.

鈥淟ast week we actually got smoke from the Alberta fires that came through the jet stream, so thinking that you are safe just because you are not in the proximity of the fire is false,鈥� Chiasson said.

Adding to the concern, she said, are fires in urban areas where the smoke can carry particles from various materials.

鈥漎ou do have added elements, plastic and other materials that are burning. It is more worrisome that it鈥檚 not just wood that鈥檚 burning.鈥�

People who spend prolonged periods outdoors near a wildfire should wear a respirator, Chiasson said, while those further distances away can wear an N-95 mask. 鈥淩egular cloth masks are not sufficient,鈥� she said.

Symptoms of smoke exposure can range from burning eyes, sore throats, coughs and runny noses in healthier people, to more catastrophic consequences for those with health conditions.

鈥淪omeone who has asthma or COPD (chronic obstructive pulmonary disease), they may start to feel really short of breath, and could cough and wheeze to the point that they may end up in emergency,鈥� said Chiasson.

Still, as of late Tuesday, the province鈥檚 largest emergency department at the QEII Health Sciences Centre in Halifax hadn鈥檛 seen an increase in patients suffering from smoke-related respiratory problems, according to Dr. Janet MacIntyre, the clinical site chief.

鈥淏ut with the changing weather conditions we do anticipate that might change,鈥� said MacIntyre. 鈥淭here may be more exposure to smoke and exacerbation of chronic illnesses related to that exposure in the coming days.鈥�

Bob Robichaud, a warning preparedness meteorologist with Environment and Climate Change Canada, said Tuesday that weather conditions expected to persist until at least Friday mean that air quality is likely to remain a problem.

Robichaud said the worst times will be at night and early morning, when clear skies and cooler temperatures keep smoke closer to the ground.

鈥淚f possible stay indoors keeping windows and doors closed and limiting the time outdoors especially during times we know when air quality is going to be poor,鈥� said Robichaud.

As of late Wednesday there were 14 active fires across Nova Scotia with three burning out of control.

This report by 春色直播was first published May 31, 2023.