Co-exposure to heatwaves and landscape fire smoke is rising globally

A 20-year study reveals that 287 million people globally were exposed to both heatwaves and wildfires on the same days, with over half of the world's population affected. The study warns that cardiovascular and respiratory illnesses will continue to increase as climate warming leads to more combined heatwaves and wildfires.

A global study found that heatwaves caused an additional 153,000+ deaths per year, with nearly half in Asia. The study's authors call for localized adaptation planning and risk management to address the growing mortality burden associated with heatwaves.

A new study led by Harvard T.H. Chan School of Public Health researchers found that fire smoke exposure can alter the immune system on a cellular level, even in healthy individuals. Exposure to particulate matter, gases, and other compounds in fire smoke was linked to changes in immune cells, inflammation, and gene expression.

A new online platform, SMRT-Flames, estimates the health impacts of wildfire smoke and provides fire managers with tools to assess potential smoke exposure. The app uses a Harvard-developed computer model to predict how fires would behave across regions and how smoke would pool and disperse.

Marine heatwaves in UK waters have been characterized for the first time, revealing regional variability and seasonal differences. The southern North Sea and English Channel tend to experience longer and moderately intense heatwaves, while the eastern North Sea has shorter but more intense heatwaves.

A new study found that heatwaves in Brazil are disproportionately affecting female, elderly, Black, Brown, and low-education individuals, resulting in a staggering 48,075 deaths between 2000 and 2018. The research highlights the need for targeted efforts to reduce mortality rates during future heatwaves.