Having lived in the Livermore Valley for most of my adult life (since 1977), I heard about Valley fever early on. This disease is mostly prevalent in California huge Central Valley (and hence its name), but Livermore Valley is only separated from the Central Valley by the 35-mile Altamont Pass, so Valley fever occasionally creeps over the pass to infect someone in Livermore Valley, or more-likely someone commutes one way or the other through the Altamont, and thus spends much time in the Central Valley.
But guess what, Valley fever has been expanding its range for many years, and this is continuing, and accelerating – fueled by climate change.