As memories of disasters fade, the money set aside to address them dwindles. Take the case of the Inverness flood control district, established in the aftermath of the devastating 1982 storm that sent several homes sliding down hillsides, overturned cars and left Sir Francis Drake Boulevard impassable for several days. In the immediate aftermath, residents raised $200,000 for dredging and stabilizing the town’s creeks. But four years later, after most of the cleanup was done,…