....which got denser at the bottom and had the tell-tale coloring associated with smoke from a fire.
As you can see the animals were calmly browsing while the fire was building in size and moving towards us.
The heavier the smoke got the more dramatic the coloring of the sun became. When we left it was blood red in color.
One of the many planes (there were 7 in all plus 2 helicopters) flying into the smoke. This was the observation plane. Its job was to inform the water planes of where to drop the load of water and/or retardant they were carrying.