IMD puts 20 states on a heavy-rain alert through a wet spell to 16 September

The India Meteorological Department warned on Saturday that heavy rain, thunderstorms and gusty winds would affect about 20 states, with the wet spell in and around Delhi lasting through 16 September. Wind speeds of up to 75 km/h are possible in parts of the northern belt. Delhi itself is listed for light rain at many places and moderate rain at isolated spots, with gusts of 45 to 50 km/h, a high near 33 C and a low near 27 C.

The states named across IMD bulletins and same-day summaries include Delhi, Uttar Pradesh, Bihar, Rajasthan, Madhya Pradesh, Himachal Pradesh, Uttarakhand, Haryana, Punjab, Jammu and Kashmir, Jharkhand, West Bengal, Odisha, Chhattisgarh, Assam, Maharashtra, Gujarat, Telangana, Kerala, Tripura and Nagaland. Intensity will not be uniform. District-level heavy-rain alerts were flagged for parts of Uttar Pradesh, Bihar and Madhya Pradesh. Fishermen on several coasts were told to take extra care.

The hill warning is the part that outlasts a wet weekend in the plains. Himachal Pradesh and Uttarakhand were told to treat landslide risk as elevated. Those two states have spent recent monsoons counting blocked highways and damaged hillside houses after similar alerts. A 75 km/h gust on a saturated slope is a different problem from waterlogging on Ring Road.

In Delhi-NCR the operational effect is familiar: water on arterial roads, slower airport and rail movement, and short bursts of lightning. The forecast that the wet spell holds until 16 September matters more than Saturday's own totals. Four more days of showers on already wet ground is how underpasses flood even when no single hour looks extreme on a rain gauge.

The southwest monsoon is still active in mid-September, which is late but not rare. What officials will watch is whether the same system that is wetting the Gangetic plain also stalls over the hills. Rescue capacity in Himachal and Uttarakhand is finite. An alert that names 20 states is a map of where to pre-position pumps and traffic police. An alert that names the hills is a map of where a single slope failure closes a national highway.

Local administrations in Malkangiri, Odisha, had already closed schools under an orange warning and were told heavy rain could last through 13 September. That is one district inside a national bulletin. The national bulletin does not replace those local calls. It does tell a reader in Delhi why the next four evenings may look the same: cloud, wind, standing water, and a temperature band that barely moves.