New Delhi, July 20 -- Delhi's stifling break from the monsoon is finally drawing to a close.

While scattered showers have already hit parts of the national capital, the India Meteorological Department (IMD) has issued a yellow alert starting Tuesday, July 21, signalling the onset of a widespread and sustained rainy spell.

Before the heavier rains arrive tomorrow, here is what you can expect in Delhi today:

Delhi's recent stretch of dry heat and the impending shift were reportedly a direct result of the trough sitting in the wrong place.

The monsoon trough is a long belt of low pressure stretching from Rajasthan to the Bay of Bengal. It acts as the underlying "spine" of the monsoon-wherever it sits, moist winds converge, rise, cool, an...