The South Coast Air Quality Management District issued a smoke advisory for areas affected by the Williams Fire burning just north of Azusa in the Angeles National Forest. "The fire itself is down on the front range of the mountains, and there's a strong atmospheric inversion," the AQMD's Sam Atwood said. "The smoke is trapped in our air basin." The agency's smoke advisory urges residents, especially those with asthma, to stay indoors if possible or limit outdoor activities in the following areas: the east San Fernando Valley; the east, west and south San Gabriel Valley; Pomona/Walnut Valley; Norco/Corona; Metropolitan...