My fourth summer in Nashville and I’m still not accustomed to it—the fast and furious rain storms that interrupt your day in the rudest way and leave you, just as suddenly as they came, walking along steamy pavement. This girl from the desert of south Texas is still surprised that rain in the summer even happens. I watched a downpour like this the other day from the safety of my living room. People were on the street one minute and then nowhere to be seen the next. They had wisely run for cover. This particular rain was the…