Sunflower in September

I'm very surprised to see the sunflower standing alone in the flower vase in the apartment houses near my house.
It's rare to find such a summer flower in this season.
It's because of change of weather these days, summer heat is still lingering over 30C in the day time. Living things can't feel the regular season and might have to miss beautiful autumn color.
The sunflower blooms getting the strong summer heat. They are just natural to the biology.