[stevenwoo]

I've been in Barcelona during a summer month during a heat wave. People still biked and walked, many of the streets and paths will be shaded at least on one side by the three to five story buildings on most streets except when the sun is directly overhead, and down the middle of some boulevards there are some very generously wide paths and trees providing shade. It's a very different experience from Houston which is pancake flat by comparison to Barcelona, Barcelona actually has hills.