 Firefighters in California keeping an eye on the weather. Forecasters warning that the heat wave will continue this weekend and spread into the Pacific Northwest. Officials say some 20 wildfires are burning in California, including one near Yosemite National Park called the French Fire. It started Thursday evening and led to evacuations in the small town of Mariposa. Wildfires likely aren't helping air quality in California. Neither do Fourth of July fireworks. The LAS Aaron Stone has more from Los Angeles.