Just heard a state of emergency has been declared. The fires in Yosemite are causing major destruction in this beloved national park and some areas of 8 other western states . We are hearing news reports that SF's water and air quality may be compromised. After weeks of planning, it has occurred to me that this may not be a good time to visit (arriving Sept.10th) and we may need to adjust our itinerary. This is our first trip to CA and I'm not sure if we should sit tight or begin to think of changes that could be made.