What to KnowA wind-driven brush fire broke out at about 10:30 a.m. in Pacific Palisades, threatening homes and forcing evacuations on a day of red flag warnings. Drivers, including people trying to evacuate the LA County coastal community, encountered traffic gridlock on PCH and other roads.Red flag warnings are in effect for the Malibu coast, Santa Monica Mountains Recreational Area, and the San Gabriel, San Fernando and Santa Clarita valleys.The warning was extended to Los Angeles County beaches, the Palos Verdes Hills and the inland Los Angeles County coast stretching into downtown Los Angeles.The most intense red flag fire weather conditions are expected Tuesday night into Wednesday. Caltrans closed Topanga Canyon Boulevard between Mulholland Drive and Pacific Coast Highway due to wildfire danger.Why is it so windy? The weather is all about Southern California topography and the notorious Santa Ana winds. A destructive wildfire is burning in Pacific Palisades on a day when Los Angeles and other parts of Southern California are seeing powerful gusts as a Santa Ana windstorm brings potentially damaging winds and red flag warnings to the region. Follow our live blog below for forecast updates, power outages, road closures and breaking news.