Geomac has keyed on the wrong location. The big fire is on the Okla-Kansas border about 150 miles west of the fire shown.
It can take some fooling around to get the "app" to dance to your tune. It has tons of info and links to more in the wildfire universe. Zoom and pan, zoom and pan. Plus select the data to show from the legend.
Turn on the MODIS fire detection.
Data LAyers -> Active Fires -> MODIS