A heavy downpour of rain has chilled the entire Chennai city and refreshed it completely. Places including Adambakkam, Saidapet, Madippakkam, Velachery, Sozhinganallur and T nagar have received heavy rain with thunderstorms. Though it has brought a refreshment, the city traffic has troubled the people who drive two wheelers. Damp road and heavy traffic have affected the public transport, and has caused congestion in the city.