It will RuFu on Sunday, 10 hottest days longer than the previous years

　　On July 17th it will RuFu ,the beginning of the hottest days in summer . There will be forty hottest days this year, from July 17th to August 25th ,10 days longer than the previous years . Will the forty-hottest days hotter than normal thirty-hottest days? Well, it depends on many meteorological factors, say the meteorological experts. Yet the obvious characteristic of Fu days, the hottest days in summer is high temperature, low air pressure, high humidity and low wind speed ,so the forty-hottest days may not hotter than the thirty-hottest days.