Southwest Monsoon to Hit Kerala on June 4 as India Braces for Widespread Rain

The southwest monsoon, India's life-giving rainy season, is finally set to arrive over the southern state of Kerala around June 4, the India Meteorological Department (IMD) has confirmed, after a delay that pushed the onset past its normal date of June 1 and earlier predictions of May 26. Weather models indicate that strong upper-level winds essential for a robust monsoon will establish only after June 5-6, suggesting a gradual intensification of rainfall following a relatively mild initial push. Isolated locations in Kerala are expected to receive very heavy rainfall of up to 20 cm over the next week, prompting orange alerts across several districts including Malappuram, Kozhikode and Wayanad. The delayed but potent arrival is being watched closely by a nation where agriculture and water supplies depend heavily on the June-September monsoon.

Across northern and central India, an abrupt change in weather has brought respite from weeks of punishing heat. In Delhi, temperatures on June 1 dipped to a maximum of 36.3°C, marking the coolest start to the month in three years, as western disturbances and cyclonic circulations triggered thunderstorms and light rain. The relief, however, may be short-lived: the IMD has warned of a gradual rise in temperatures over the coming days. Meanwhile, thunderstorm alerts have been issued for large swathes of the country, from Telangana—where orange warnings are in place for six districts including Adilabad and Nirmal—to eastern states such as West Bengal, Sikkim and Arunachal Pradesh, and southern regions including Karnataka, Andhra Pradesh and Tamil Nadu. Gusty winds reaching up to 70 kmph and isolated hailstorms are possible, posing risks to crops and infrastructure.

Viewed from a wider lens, the volatile start to June is not confined to the subcontinent. In the central United States, forecasters are tracking a long stretch of severe storms across the Great Plains and Mississippi Valley, with threats of damaging winds, large hail, flash flooding and tornadoes. The US National Weather Service projects a week of back-to-back systems, with the most intense activity on June 2 stretching from New Mexico to the Dakotas. Simultaneously, a tropical wave moving across Mexico's Yucatán Peninsula is interacting with atmospheric troughs to deliver intense rainfall and thunderstorms to the country's southeast, while a dangerous heatwave persists in the north. Authorities have warned of landslides and river flooding in states such as Veracruz, Oaxaca and Chiapas through June 5.

For India, the monsoon's timely arrival—even if slightly delayed—provides a psychological and economic boost, yet meteorologists remain cautious. The IMD and other agencies have forecast below-normal cumulative rainfall this season, a prospect that could strain agricultural output and water resources in the world's most populous nation. As climate variability intensifies, the synchronization of extreme weather events across continents underscores the interconnectedness of global atmospheric systems—and the shared vulnerability of communities from Kerala to Kansas.