This afternoon, Ozone concentrations reached moderate and unhealthy levels for sensitive groups in different states. The morning was good throughout the Country but levels increased in the Mid-Atlantic, Mississippi Valley and Texas (top left). Moderate PM2.5 levels were reached in the Northeast and Mississippi regions as well as in California. Some stations read unhealthy (code red) levels in the fires areas. Several fires in USA and Canada continue taking place releasing tons of smoke. A very large area of light and moderately dense remnant smoke can be seen stretching from portions of northern California, eastward into the northern and central Plains. Large wildfires continue to burn throughout the western US through California, Nevada and Idaho and are leading to this large area of smoke as it moves eastward (top left). MODIS instrument on AQUA satellite captured the smoke from fires in Idaho (middle). In Canada, moderately dense smoke can be seen moving through portions of western Canada this morning and early afternoon. This is likely smoke coming from the Siberian wildfires mixed in with remnant smoke from the numerous fires continuing to burn through British Columbia and southern Yukon and Northwest Territories. Finally, high AOD levels were detected in the in Idaho, Montana and western Canada due to the fires (bottom).