From Alex Wellerstein (NukeMap guy) on Twitter. As I figured in my own analysis, the Oxnard/Port Hueneme/Camarillo area is at risk from the Navy bases. Simi and Thousand Oaks are a surprise. Probably from megaton warheads over the San Fernando Valley or at Rocketdyne. The megaton warheads are gone as are Rocketdyne, so those cities are probably going to be okay. Source: High Risk Areas: For Civil Preparedness Nuclear Defense Planning Purposes
Related article: What the 1970s Nuclear Risk Maps Tell Us About Nuke Risks Today
Note: this an adaptation from my non-fiction book Suburban Warfare: A cop's guide to surviving a civil war, SHTF, or modern urban combat, available on Amazon.