 Rain has arrived in northern California. Communities surrounding Lake Berryessa in Napa County could have used this in August and September when the Hennessy fire and then the LNU complex fire raged here, burning 363,000 acres and destroying 1,491 homes and buildings. Now just over a month after containment, crews are working hard to prevent water pollution. When natural areas burn, they release natural materials. When man-made objects burn, they release all kinds of chemicals and pollutants that are harmful to us and to water. Just look around and you'll see some of what Jameson Crosby, stormwater program manager with Napa County is talking about. Metals, plastics and then more of what you can't see. Chemicals and hazardous particles like asbestos, mercury, arsenic and lead. Rain washes all that hazmat from these burn scars downhill. They run down into our creeks and lakes and waterways and they end up right down there in Lake Berryessa. Napa County reached out to Cal OES who then tapped the California Conservation Corps to help with pollution mitigation. Teams from the CCC are scattered all over the area. They're installing these straw filled wattles along pathways tainted water would flow. They will absorb it or redirect it to storm drains that carry it away from Lake Berryessa and other waterways, protecting the main source of drinking water for more than 400,000 people. For more information on wildfire recovery efforts, go to wildfirerecovery.ca.gov and follow Cal OES on social media. I'm Sean Boyd for Cal OES News.