Indian authorities in the capital have ordered schools shut early for the summer holiday, after temperatures hit 47.4 degrees Celsius (117 degrees Fahrenheit) with Delhi gripped by a “severe heat wave”. Indian authorities in the capital have ordered schools shut early for the summer holiday, after temperatures hit 47.4 degrees Celsius (117 degrees Fahrenheit) with Delhi gripped by a “severe heat wave”. Environment Phys.org – latest science and technology news stories