IMD Warns of Heavy Rain in Parts of South India as Delhi Stays Mostly Dry

IMD Warns of Heavy Rain in Parts of South India as Delhi Stays Mostly Dry. This report covers developments reported on October 20, 2026, and separates confirmed steps from claims, forecasts and possible next moves.

Different weather across India

The India Meteorological Department warned of heavy to very heavy rain at isolated places in parts of southern India on Tuesday, October 20, while Delhi was expected to remain largely dry. Business Standard reported the forecast in the morning. The contrast reflects the seasonal shift after the withdrawal of the southwest monsoon. A warning for isolated locations does not mean an entire state will experience the same intensity, so district-level bulletins are essential for planning travel and outdoor work.

Areas mentioned in the forecast

The report said heavy to very heavy rain was possible at isolated locations in Tamil Nadu, Puducherry and Karaikal. Heavy rain was also forecast at isolated places in coastal Andhra Pradesh, Kerala and the Andaman and Nicobar Islands. These are forecast risks rather than confirmed measurements of rainfall at every listed place. Residents in flood-prone streets, low-lying settlements and coastal areas should monitor local updates, because even a brief intense spell can create problems that a broad regional forecast does not show.

Thunderstorm and wind risk

Thunderstorms with lightning and gusty winds were also expected in parts of Madhya Pradesh, Rajasthan, Odisha, Telangana, Konkan and Goa. The published outlook mentioned winds of around 40 to 50 kilometres per hour, with stronger gusts possible in some affected areas. Thunderstorms can be highly localised. People planning outdoor events should pay attention to lightning and sudden wind changes rather than waiting for sustained heavy rain. Sheltering under an isolated tree or near exposed electrical equipment is unsafe during lightning.

Andaman and Nicobar outlook

The Andaman and Nicobar Islands were expected to see widespread rainfall activity during October 20 to 25, with isolated heavy rain possible on October 20 and again later in the period. Island travel can be affected by local weather, visibility and sea conditions, so ferry or flight status should be checked with operators. A multi-day forecast is not a guarantee of continuous rain. Conditions may vary between islands and can change as weather systems move through the Bay of Bengal.

Delhi forecast and observations

Delhi’s Safdarjung station recorded a minimum temperature of 17.1 degrees Celsius on Tuesday, according to the reported IMD observations. The city was expected to see mostly clear skies and a maximum temperature in the low thirties. Business Standard said dry conditions were likely to continue through much of the week. Those figures describe Delhi and should not be applied to other cities in the National Capital Region without checking their own readings and forecasts.

Why rain continues after monsoon withdrawal

The southwest monsoon withdrew from India on October 15, but that does not mean rainfall stops across the country. During the seasonal transition, changing winds bring moisture toward the southeast coast, contributing to the northeast monsoon. Tamil Nadu relies heavily on this season for a significant share of its annual rainfall. The timing is normal in broad terms, yet the location and intensity of individual downpours still require close monitoring. Seasonal averages do not tell a resident whether a particular road will flood tonight.

Practical precautions

People in areas under heavy-rain warnings should check drainage conditions, keep phones charged and avoid driving into water whose depth is unclear. Motorists should slow down during poor visibility and avoid parking beneath unstable branches or structures during strong winds. Fishing communities and boat operators should follow marine advisories where issued. School or office closures should never be inferred from a weather forecast alone; those require a specific announcement by the relevant authority.

How to follow the changing forecast

Weather alerts are time-sensitive and may be upgraded, downgraded or narrowed to individual districts. The useful next update will be a current IMD bulletin, local disaster-management advisory or verified observation. Rainfall totals, warning colours and wind speeds should be quoted with their time and location. For readers outside the listed areas, the forecast is background information, not an instruction to expect the same conditions. The central message is regional variation and the need for location-specific decisions.

Rainfall warnings and actual rainfall

A warning indicates the likelihood of hazardous conditions; observed rainfall tells us what occurred at a particular station. Those numbers should not be mixed. A forecast for isolated heavy rain can be accurate even when many nearby towns receive only light showers. Likewise, one flooded road does not prove that an entire district experienced extreme rain. Readers should check the time of the forecast, the area it covers and any updated observations before using it to plan travel or share an alert.

Why local preparedness matters

Heavy rain risk affects places differently depending on drainage, terrain, tides and recent rainfall. Coastal towns, hill roads and low-lying urban neighbourhoods may need different precautions even under the same regional alert. Local authorities may issue route closures or safety instructions after seeing conditions on the ground. A forecast is therefore a prompt to prepare and check updates, not evidence that a closure has already been ordered. Clear communication about uncertainty helps people take sensible precautions without unnecessary alarm.

What a heavy-rain warning means

A heavy-rain warning identifies a possibility over a stated area and period; it is not a measured total at every address. Local rainfall can be much greater or smaller than the regional outlook. Readers should also distinguish the warning for rainfall from any separate alert for wind, lightning or sea conditions. A district administration may issue additional instructions when local drainage, reservoir or road conditions warrant them. Those decisions require checking the latest bulletin.

Editorial note: This article is based on attributed reporting available on October 20, 2026. It is not a live official bulletin. Developments may change after the reporting time.