Just after 12:30 am Houston Fire Department was dispatched to smoke in the area call on Kingwood Drive at US 59.While en route the call was upgraded to an office building fire. The first truck in found fire in the center of the section of the Honda dealership. As firefighters arrived and started to lay lines the second section of the structure caught fire and erupted in flames. At that point, the District Chief called for additional pumpers and a ladder truck. Just as they made entry to the second section of the building multiple explosions could be seen and heard. Moments later the power system erupted in flames causing the transformers on US 59 to explode. The fire then spread to the next section of the building which was the shop. Crews worked to control that blaze as multiple tanks of hazardous fluids were stored on the back wall. US 59 feeder southbound at Kingwood remains closed and will be past daylight.