Compounding the extreme temperature is a plume of Saharan Dust drifting across the Atlantic. Air Quality Degradation: The fine dust particles (PM2.5) reduce air quality, turning skies milky haze and creating dangerous respiratory conditions for sensitive individuals. If you must step outside on high dust days, wear a well-fitted to filter out fine particulate dust. Use HEPA Air Filtration: Run indoor air purifiers equipped with HEPA filters to clear fine dust particles that leak into the home. Latest Weather Forecast OutlookHeat Advisories will remain in effect through the late workweek as the high-pressure system and Saharan dust continue to hover over the peninsula.