Insured losses from the Aug. 24 earthquake that struck Napa, Calif. will not exceed $250 million, according to a risk management firm. Widespread damage was expected from the 6.0 magnitude event, but there wasn’t much business interruption as most area businesses, including wineries, reopened within a week after it struck, said Catastrophe risk manager RMS. There were 250 reported injuries, mostly minor, and no fatalities reported.