SkyEye was over the area, which appeared to be burning at a landscaping business near Frank's Nursery on FM 359.
Helicopter reporter Tammy Rose said that she could see the smoke from about 20 miles away while SkyEye was arriving.
You may want to avoid the area if you can.
ABC13 is working to find out how the fire started and if there are injuries.
Richmond firefighters responding to large mulch fire on FM 359