Multiple medical and scientific sources report that smoke from wildfires affects nearly every system in the human body and contributes to substantial annual mortality. As climate change warms the Northern Hemisphere, wildfire seasons and the amount of area burned are increasing, which increases exposure to smoke for more people. The reported health impacts span respiratory effects and extend beyond the lungs, with research describing damage and stress linked to cardiovascular, neurological, and other bodily systems. These accounts synthesize findings from numerous medical studies that connect wildfire smoke exposure to premature deaths and a wide range of health outcomes. The sources also emphasize that wildfire smoke is a complex mixture of pollutants, and that inhaled particles and gases can trigger harmful biological responses across the body. Overall, the articles describe wildfire smoke as an escalating public health threat, with tens of thousands of deaths each year attributed in the literature to smoke exposure and related mechanisms.