The first image below, courtesy NOAA HMS, shows the fire locations across the United States. The red dots correspond to active fires, and the grey areas are plumes. The major concentration of fires is in the Southeast region (especially Cuba) and Central Canada. Although there is a large concentration of fires, there is little smoke being picked up by HMS. There is a small smoke plume on the Pacific ocean in western California. The second image below, courtesy MODIS Terra, shows the retrieved AOD for the country today. You can see that most of these raised values correspond to more optically thick areas, which correspond to the fires and smoke debris throughout the nation. There is an AOD enhancement in southern Central Canada which is most likely due to fires in the region. There is an increase in AOD near southern Texas that is most likely due to fires from Mexico and Texas.
The first image, courtesy NAAPS, is a model run which shows an increase in sulfates in the eastern portion of the country over the next few days. The next image, courtesy OMI NRT, shows the retrieved NO2 column for the troposphere. This image shows a large amount of NO2 in the Mid Atlantic/Great Lakes regions and southern California. This enhancement in NO2 shows that in the eastern coast there is not only a sulfate enhancement but a large nitrate aerosol enhancement. These high NO2 tropospheric concentrations tend to correlate with the locations of higher PM2.5 concentrations, which is confirmed for today with many code yellows in these regions.