Hartriono B. Sastrowardoyo reports in the Poughkeepsie Journal that smoke from raging wildfires in western Canada has been wafting into the Hudson Valley this week. The National Weather Service Tweeted, "When larger particles in the atmosphere such as smoke or dust scatter light, they scatter longer wavelengths better." So the smoke from distant Canadian wildfires has caused vivid, red sunsets in the Hudson Valley this week. A passing cold front with a small bit of rain on May 24 may clear the air locally. Read more about this story in the Poughkeepsie Journal.