The heat wave has struck San Diego as well as the rest of the country. I have a question about the heat. Seems I heard somewhere the actual temperature is higher on a road than somewhere else, because of heat radiating from the pavement. is that true? And if it's true, is there a rule of thumb about how much hotter it actually is when out riding on the streets? For instance, today it was in the mid-90's (according to the weather service) with (by San Diego standards) quite a bit of humidity. Was the real temperature higher on my bike? Or is it like wind chill, and it just SEEMS higher?