Climate scientists say South Asia's heat wave (120F!) is a sign of what's to come

People rest in the shade of a tree on a hot summer afternoon in Lucknow in the central Indian state of Uttar Pradesh, on Thursday. Severe heat wave conditions are sweeping north and western parts of India. (Rajesh Kumar Singh / AP)

MUMBAI, India – Summer has arrived in South Asia WAY too early.

A punishing heat wave has pushed temperatures past 120F (50C) in some areas. Some schools have closed early for the summer. Dozens of people have people have died of heat stroke.