India Meteorological Department experts have issued heatwave alerts for Delhi, Uttar Pradesh, and Rajasthan after the southwest monsoon slowed unexpectedly [1].

The sudden deceleration of the seasonal rains threatens agricultural productivity and public health across Northern India. Because the monsoon provides the primary water source for the region's crops, a significant delay in rainfall can lead to severe water shortages and economic instability.

According to the IMD, the monsoon had an early and rapid start this June [1]. However, the progression of the weather system has since stalled, leaving several northern states without the anticipated cooling rains. This shift has triggered official heatwave warnings for Delhi, Uttar Pradesh, and Rajasthan [1].

The weather disruption extends beyond the north. The slowdown is also affecting central and western states, including Maharashtra and Gujarat [1]. Residents in these areas are experiencing prolonged high temperatures as the moisture-laden winds fail to penetrate inland at the expected pace.

Meteorologists have identified the cause of this atmospheric stall. Experts said the slowdown is linked to a weak Somali Jet and shifting weather patterns [1]. The Somali Jet is a low-level wind current that typically helps drive the monsoon winds toward the Indian subcontinent.

When this jet weakens, the transport of moisture from the Indian Ocean is diminished. This creates a atmospheric blockage that prevents the monsoon from advancing toward the northern plains, leaving cities like Delhi vulnerable to extreme heat [1].

Local authorities are monitoring the situation as they coordinate emergency cooling centers and water distribution. The IMD continues to track the Somali Jet's activity to determine when the rains will resume their northward trajectory [1].

“The southwest monsoon has slowed down unexpectedly after an early rapid start.”

The disruption of the Somali Jet highlights the volatility of the 2026 monsoon season. When the primary wind mechanism driving moisture fails, it creates a dangerous gap between the early onset of the season and the actual arrival of rain in the northern heartland, increasing the risk of heat-related casualties and crop failure.