India, May 2 -- This morning, I noticed the streets in my city were red with Gulmohar petals and the treetops a fiery red. Within weeks, the Jacaranda seems to be doing the disappearing act - the dainty purple flowers giving way to the flamboyant display of orange-red blooms.

The early morning breeze offers a soothing reprieve from the May heat with the melodious singing of the summer birds, sweet scent of flowers and the red flame thanks to the flowering trees, which are a treat to the eyes.

Driving through the bustling lanes later in the day, one might just be able to ignore the rising temperatures the city is facing this summer. Between the traffic signals and the chaotic junctions are plumes of flaming Gulmohars. Discovered in the 1...