El Niño Has Arrived — Here's What the Satellites Saw, and What It Means for India
Off the coast of South America, the sea is standing more than 15 centimetres taller than usual. That's not a tide or a storm — it's the signature of a giant underwater wave of warm water, called a Kelvin wave, that has been sliding across the Pacific Ocean for months. It is the calling card of El Niño, and this one is shaping up to be among the strongest ever recorded.
What the satellite actually shows
Reading the cover image
NASA's Sentinel-6 Michael Freilich satellite measures the height of the sea, down to fractions of an inch, by bouncing radar off the surface every ten days. It can't measure temperature directly — but warm water expands and rises, so a taller sea surface is a reliable stand-in for a hotter one. In the image at the top of this page, the arrow points to exactly what the colour scale measures: a thin red band riding the equator into the coast of South America.
- The arrow in the image points to exactly where the colour scale predicts: a thin red band riding the equator into the coast of Central and South America.
- That red band is the Kelvin wave itself — sea level there now reads at or beyond the top of the scale, ≥ +15 cm above average.
- Most of the open Pacific stays green — near 0 cm — a reminder this is a narrow, fast-moving feature, not basin-wide warming.
- A patch of dark blue/purple sits in the far western Pacific — water pulled away from that side as it flows east, the mirror image of the warming near the Americas.
By the numbers
How big, how fast
How a kelvin wave is born
From weak winds to a warm wall of water
1 · Winds stall, then reverse
Trade winds over the western Pacific, which normally blow from east to west, weaken and briefly flip direction.
2 · Warm water piles up in the east
With nothing pushing it westward, warm surface water builds up and deepens instead of being swept away.
3 · A wave forms and travels
That bulge of warm water becomes a Kelvin wave and rolls slowly eastward across the Pacific over several weeks.
4 · It reaches South America
The wave arrives off Peru and Ecuador, lifting sea levels there and signalling El Niño is taking hold.
Why anyone outside the Pacific should care
A regional wave, a global remote control
Once that warm patch of ocean sits in the eastern Pacific for long enough, it nudges the jet stream and shifts storm tracks worldwide. The effect isn't uniform — some places get drenched, others dry out.
Southwestern United States, parts of Peru and Ecuador tend to see heavier rain.
The western Pacific — Indonesia, parts of Australia — typically sees rainfall drop.
East Africa has historically seen flooding during the strongest El Niño years.
Southern Africa often swings toward drought in a strong event.
Strong El Niño years almost always push global temperatures higher and reshuffle rainfall across large parts of the world. — Paraphrased from NASA / JPL sea-level researchers
The view from India
A weak monsoon is already underway
India is one of the places El Niño hits hardest, because it tends to weaken the southwest monsoon — the rain India's farms, reservoirs, and food prices depend on. This year the link showed up fast: the India Meteorological Department has flagged a below-normal monsoon, and by late June, rain deficiency had touched roughly 43% in places, well ahead of NOAA's own declaration.
315 districts now on the government's watch list
In late June 2026, the Union Agriculture Ministry classified 315 districts as likely to be affected by low rainfall this year, splitting them by how exposed each one is — judged mainly by how much of its farmland has irrigation, versus relying on rain alone.
Most of the 111 worst-off districts sit in Maharashtra and Madhya Pradesh — Maharashtra alone accounts for around 22 of them.
What's already showing up on the ground
| Signal | What's happening |
|---|---|
| Rainfall | IMD projects the monsoon at roughly 90–92% of the long-period average; weak conditions are expected to persist into early July. |
| Sowing | As of late June, kharif sowing covered under 10% of the normal cultivated area — slightly ahead of last year, but soybean is lagging. |
| Reservoirs | Water stored across the country's major reservoirs fell from about 39% to 34% of capacity in just two weeks in May. |
| Crops at risk | Water-hungry kharif crops like paddy and maize, plus the pulses and oilseeds missions — about 90% rain-fed — are most exposed. |
How the Centre is preparing
| Step | Detail |
|---|---|
| Contingency plans rewritten | States were asked to update decade-old district contingency plans specifically for this El Niño year. |
| Monitoring cell set up | An El Niño Monitoring Cell and Crop Weather Watch Group now track conditions in real time. |
| Targeted support | In the 111 most vulnerable districts: full crop insurance push, easier loan access, fresh seed stocks for replanting, and priority use of available irrigation water. |
| High-level coordination | State agriculture ministers, district collectors, and IMD officials met directly to align on the response. |
Weak monsoon conditions are likely to persist for now, which could affect the kharif harvest — particularly water-hungry crops like paddy and maize. — Paraphrased from Union Agriculture Minister Shivraj Singh Chouhan
What to watch next
The next few months matter most
El Niño events typically peak between November and January, so its full effect on India's monsoon, and on global weather more broadly, will only become clear over the rest of the year. Researchers caution that a strong El Niño doesn't automatically guarantee an agricultural crisis — how it plays out still depends on rainfall over the coming weeks, reservoir recovery, and how well the targeted support in the most vulnerable districts holds up.
Built from NASA/JPL satellite imagery and reporting, NOAA's ENSO updates, IMD forecasts, and Indian government district-vulnerability classifications as reported through late June 2026. District and reservoir figures will continue to be revised as the monsoon season progresses.
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