Near st. Helena. Terry mcsweeney, you were with crews a authority tishort its believed that lightning started this fire. Reporter a lot of evidence that lightning started it. I was talking to firefighters here. They say the focus tonight is on structure protection, saving the homes which are up state route 128, closed off as you can see. Everywhere you look, theres fire on the mountain. Huge flames leaping into the night sky along hennessey ridge. Cal fire says this fire has burned 2,400 acres and is 0 contained. With the hot, dry conditions that weve been having and then coupled with this weather that weve had, its not common for the area with all the lightning strikes that weve been having. Its just its very can be very hazardous for the fire conditions. Reporter the cause believed to be lightning. This video from the local chp office showing a strike a short while before the first reports of fire. This structure fell victim to the flames today. More than 200 other buildings are thre