The 30th anniversary of Hurricane Andrew’s assault on South Florida is days away, and for the uninitiated and those who may have forgotten, here is what the Category 5 storm did to southern Miami-Dade County and elsewhere. After striking on Aug. 24, 1992, Andrew killed 65 people, destroyed 63,000 homes, left 175,000 homeless, and in the immediate aftermath, left a million people without power. …If Andrew did the region any favors, it exposed flaws in local building codes, shoddy construction on a large scale, the pitfalls of relying on an economy focused on tourism and real estate, and deficits in storm preparation and recovery. How resilient is South Florida now? …Two Miami-Dade grand juries investigated deficiencies in both the codes and their enforcement, and strongly urged improvements. Today those improvements are a factor that many in the construction and weather forecasting businesses view as the region’s main line of defense against future big storms.