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Wildfires are a clear sign of global warming, and we are seeing an unprecedented number of blazes globally. Hundreds of millions of hectares have burned worldwide this year alone. Major, ecologically significant wildfire activity has been reported in more than 25 countries in 2026. This includes Spain, France, Greece, Portugal, Turkey, Italy, the UK, Germany, Canada, the United States, Australia, Japan, and many more.

“It’s hot, and it’s smoky—how can you protect your lungs outdoors with a mask without overheating?” asks Prof. Maria Gillespie, Founder of @MaskTogetherColorado. She shares a simple way to add a valve to your favorite high-filtration respirator so you can tolerate the heat better: “By adding an exhalation valve! Our fit tester, Mish, tested the solution shown here of installing a Zimi exhalation valve on your favorite mask to help keep cool outdoors in the summer.”

While we need protection from wildfire smoke, firefighters need durable, breathable PPE too. @MaskNerd Aaron Collins’s recommendation for minimum protection is an elastomeric respirator with P100 organic vapor filters.

And don’t forget that respiratory pathogens also spread year-round. When shopping indoors or watching a movie in a theater, switching to a well-fitted respirator without a valve will provide a good layer of protection for you and your community.

Stay safe and stay cool! #MaskTogetherColorado #MaskTogetherAmerica 😷❤️
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