The fire started late afternoon on Wednesday Nov 23rd, 2011 (2 days before Thanksgiving). At around 10pm, we kept getting a faint wood burning smell but thought that the neighbor had a firewood burning in the back yard; so we didn't pay too much attention. At around midnight we heard the sound of crackling fire. As we look out of the window bedroom, we saw the blue flame shooting out of the BBQ grill and thick smoke rising up inside the gazebo. We quickly turned off the gas main line and grabbed the water hose nearby and put out the fire. All the knobs were melted because of the intense heat. Because it was natural gas so blue flame was shooting out of the gas line through those knob holes until the gas was turn off.