The ambient temperature during the day is really that harsh. Ten minutes of exposure to the sun can drain all energy out of healthy individuals.
We complied to the appeal of the mail, and placed a fairly large vessel full of water in a secluded corner of our terrace. It was a Saturday, and I was home. I even put ice cubes in the afternoon so that the water remains cool for a longer time.
The first day, strangely, not a single bird ventured.
"These creatures must be blind", I almost thought when I saw a wasp splashing in the water. I wondered if it could communicate to the birds... from the next day, the number of visitors in our bird-bath has shot up significantly.
Every morning, I pour out the water to the plants in my so called garden [so as not to waste the water], and fill the vessel with clean water. Throughout the day, the birds chirp, tweet and make merry in their exclusive corner on my terrace.