Karachi is good, I live near the sea side, which a very wealthy area of the city. To be honest, Karachi is pretty similar to Mumbai, especially the sea side area, the environment is very nice here because of the coast and we get cool winds of the sea every night even in summers. I think in Punjab/delhi area summers are really hot. When i was in Lahore, the temperature went up to 50 degrees, Though i really love Punjab, the history/traditions/foods there are amazing