A rapidly intensifying patch of warm water in the central Pacific is reshaping global weather patterns, potentially disrupting food supplies across multiple continents, and pushing global temperatures toward territory humanity has never measured. On June 11, 2026, NOAA’s Climate Prediction Center issued an El Niño Advisory, marking the official onset of conditions that forecasters warn could rank among the strongest in the instrumental record.[1]

The Emerging Threat: Numbers That Tell the Story

Forecasts, by mid-June 2026, the Niño 3.4 index—the standard measure of El Niño intensity—had climbed to +1.7°C, reaching that threshold within a week of NOAA’s advisory. International forecast models project the event could exceed +2.0°C by autumn, with the European Center for Medium-Range Weather Forecasts (ECMWF) with the ensemble median projection of ~3.8°C by December and high-end runs reaching ~4.2°C (Figure 1).[3]

For context, the strongest El Niño on record—2015-16—peaked at approximately +2.6°C. What is building now could surpass it. NOAA places a 97% probability that the event will persist through early spring 2027, and an 81% chance of a very strong El Niño during October-December 2026, which would rank among the largest events going back to 1950, since records begun.[4]

A Cascading Global Impact

A checkerboard of rising and sinking air and altered upper-level shear patterns can be produced over a large portion of the world due to the wide area of rising air over a warm Niño 3.4 zone. In addition to hurricanes and typhoons, this variety of atmospheric reverberations, or teleconnections, impacts areas of drought and exceptionally high rainfall across most of the tropics and into the midlatitudes of North America. “Even very severe El Niño episodes do not lead to the expected impact everywhere, but stronger occurrences can more dramatically skew the probabilities in favor of expected consequences,” according to NOAA.[4]

NOAA: During El Niño, the jet stream’s position shows a dip in the Eastern Pacific. The stronger the El Niño, the farther east in the Eastern Pacific the dip in the jet stream occurs. The position of this dip in the jet stream, called a trough, can have a huge effect on the type of weather experienced in North America. El Niño’s eastern shift in the trough typically sends the storm track, with huge amounts of tropical moisture, into California, south of its normal position of the Pacific Northwest.

A very strong El Niño will cause the trough to shift further south, with the average storm track position moving into Southern California. During these times, rainfall in California can be significantly above normal, leading to numerous occurrences of flash flood and debris flows. With the storm track shifted south, the Pacific Northwest becomes drier and drier as the tropical moisture is shunted south of the region.[29]

The Atlantic Goes Quiet

El Niño is causing less hurricane activity in the Atlantic Ocean primarily due to increased vertical wind shear. When the central Pacific warms, upper-level westerly winds strengthen across the Caribbean and tropical Atlantic, increasing wind shear—the difference in wind speed and direction between upper and lower atmosphere. Developing tropical storms need vertical coherence to intensify; wind shear tears that alignment apart before they can strengthen.[2]

Colorado State University’s July 8 forecast predicted only 9 named storms, 4 hurricanes, and 1 major hurricane for the 2026 Atlantic season, compared to long-term averages of approximately 14, 7, and 3 respectively.[5]

Droughts Deepen Across a Vulnerable Belt

The human cost concentrates across regions where seasonal rainfall patterns are disrupted—and many are still recovering from the 2023-24 El Niño, which was considerably weaker than what is building now. The Caribbean, Central America’s dry corridor (El Salvador through Nicaragua), Northern Brazil, Central and Northern India, Central and Southern Africa, Indonesia, the Philippines, and Australia all face elevated drought risk. During the 2023-24 event, Zimbabwe lost roughly 60% of its maize harvest and Zambia lost about half.[6][7]

Coral Reefs Face Existential Risk

The 2015-16 El Niño drove a marine heat wave that produced the worst mass coral bleaching event ever recorded on the Great Barrier Reef, with roughly a third of the northern and central sections experiencing mortality.[8] What makes the current situation particularly alarming is that reefs have not fully recovered from the 2023-24 bleaching.[9][10] More troubling still: significant bleaching has now been documented even during La Niña years,[11] when cooler conditions historically gave corals recovery time. The biggest bleaching event on record for warm-water coral reefs occurred between 2023 and 2025, and the central estimate of their thermal tipping point—1.2°C global warming—has been exceeded.[12]

Indonesia’s Compound Risk

Indonesia faces a particularly dangerous combination of hazards. Forecasts show the Indian Ocean Dipole shifting into a positive phase by September, peaking alongside the El Niño. When these two climate drivers align, the drying effect over the Indonesian archipelago, Philippines, and northern Australia intensifies far beyond what either produces alone.[13][14]

The last time a strong El Niño coincided with a strongly positive IOD was 1997.[15] The result: peatland fires burned across Sumatra and Borneo for months, blanketing six countries in hazardous smoke, causing respiratory illness at massive scale, and releasing carbon emissions that rivaled entire industrial economies.[16] The peat soils of Indonesia are extraordinarily carbon-dense and, once ignited during dry conditions, extraordinarily difficult to extinguish.[17]

A Stressed Global System Absorbing an Unprecedented Shock

This El Niño develops amid global conflict, war-related disruptions to fertilizer supply chains,[18] aid budgets cut across multiple donor countries,[19] and humanitarian systems operating near the limits of capacity – many climate disruptions already felt around the globe. The potential for “cascading failure” increases—the same structural pattern that turns one downed power line into a regional blackout or one bank failure into a financial crisis. The individual shock isn’t unusual. The outcome becomes unusual when the system absorbing it is already stressed.

2027: The Year the World Watches

There is a critical lag in how El Niño affects global temperature. When sea surface temperatures peak in the Pacific, the heat releases into the atmosphere gradually. The observed lag between Pacific peak and maximum global temperature response is roughly three to four months.[20] If the El Niño peaks around November-January (as models expect),[21] the biggest global temperature push may arrive February 2027.

Kevin Trenberth: So atmosphere and ocean coupling is present near the dateline and that is affecting teleconnections and weather patterns, but the full so-called Bjerknes [feedback] coupling between the atmosphere and ocean can mainly occur after September when the southern hemisphere SSTs begin to rise. This is why the peaks in EN occur typically centered about December. But the biggest influences on teleconnections and warmest conditions occur some 3 months later typically in February. It then depends on whether the ocean runs out of heat, and the model results suggest they wont. But the models all do the annual cycle incorrectly.[22]

Carbon Brief projected in April, 2026 is likely to be the second-warmest year on record, and virtually certain to finish among the four warmest years on record, with a 19% chance of surpassing 2024 as the warmest – and 2027 where the full force will be felt.[23] The World Meteorological Organization places an 86% chance that at least one year between 2026 and 2030 will break 2024’s record. Lead author Leon Hermanson was specific: 2027 is the year expected to become the next record-breaker.[24]

Climate scientist James Hansen projected in December 2025 a 12-month global average of +1.7°C above pre-industrial levels during 2027.[25] And on June 12th 2026, “The year 2026 should already exceed the 2024 record, with higher temperatures to come in 2027.”[26]

Zeke Hausfarther: What does all this mean for global temperatures? Because global temperature lags ENSO by around three to five months, most of this event’s warming will land in 2027, which is now shaping up to be a genuinely alarming year and the warmest on record by a sizable margin. But a strengthening El Niño does load the dice for late 2026: our dashboard currently gives this year a non-trivial chance (~28%) of edging out 2024 as the warmest on record, up from ~13% at the start of the month..[27]

The scientific community is watching 2027. The subsurface ocean heat is still propagating. The atmosphere is still coupling. The Indian Ocean Dipole has not yet peaked. And the global temperature record that will define that year is still being written by a patch of warm water in the middle of the Pacific that has not finished telling us what it is capable of.

References

1. NOAA – Climate Prediction Center. (July 9, 2026). ENSO Diagnostic Discussion. Retrieved from https://www.cpc.ncep.noaa.gov/products/analysis_monitoring/enso_advisory/ensodisc.shtml
2. NOAA – How does El Niño Impact Atlantic Hurricane Season https://www.aoml.noaa.gov/how-does-el-nino-impact-atlantic-hurricane-season/
3. International Research Institute for Climate and Society, Columbia University. (June 22, 2026). ENSO Forecast Quick Look – June 2026. Retrieved from https://iri.columbia.edu/our-expertise/climate/forecasts/enso/current/
4. Yale Climate Connections. (June 12, 2026). El Niño is officially here, raising confidence in a quiet 2026 Atlantic hurricane season https://yaleclimateconnections.org/2026/06/el-nino-is-officially-here-raising-confidence-in-a-quiet-2026-atlantic-hurricane-season/
5. Colorado State University – Forecast for 2026 Hurricane Activity https://tropical.colostate.edu/forecasting.html
6. Zimbabwe Key Message Update May 2024: Constrained access to income is anticipated for many households following the drought https://reliefweb.int/report/zimbabwe/zimbabwe-key-message-update-may-2024-constrained-access-income-anticipated-many-households-following-drought
7. Zambia El Niño impact assessment highlights, July 2024 https://openknowledge.fao.org/server/api/core/bitstreams/33eb0849-1345-4587-9b9c-abda6fff1382/content
8. BBC – Great Barrier Reef suffered worst bleaching on record in 2016, report finds https://www.bbc.com/news/world-australia-38127320
9. Outcomes of the fourth global coral bleaching (2023–2024) in the Maldives https://link.springer.com/article/10.1007/s00338-026-02850-x
10. Widespread coral bleaching and mass mortality during the 2023–2024 marine heatwave in Little Cayman https://pmc.ncbi.nlm.nih.gov/articles/PMC12047782/
11. Global patterns and impacts of El Niño events on coral reefs: A meta-analysis https://pmc.ncbi.nlm.nih.gov/articles/PMC5798774/
12. Global Tipping Points Report 2025 https://global-tipping-points.org/
13. As super El Niño draws global attention, the Indian Ocean may hold the key to Mediterranean climate extremes https://phys.org/news/2026-07-super-el-nio-global-attention.html
14. El Niño strengthens as positive Indian Ocean Dipole raises warm, dry risk across Australia https://watchers.news/epicenter/el-nino-strengthens-as-positive-indian-ocean-dipole-raises-warm-dry-risk-across-australia/
15. In 1997, India’s ocean saved the monsoon from El Nino. This year, it won’t https://www.indiatoday.in/science/story/indian-ocean-dipole-2026-neutral-el-nino-india-monsoon-1997-kharif-crops-rainfall-2919576-2026-05-30
16. Impact of Tropical Climate Anomalies on Land Cover Changes in Sumatra’s Peatlands, Indonesia  https://www.mdpi.com/2071-1050/18/2/919
17. The amount of carbon released from peat and forest fires in Indonesia during 1997 https://www.nature.com/articles/nature01131
18. How fertilizer shortages caused by the energy crisis threaten food security https://www.nature.com/articles/d41586-026-01409-8
19. Aid cuts could cause 22m avoidable deaths by 2030, study finds https://www.theguardian.com/global-development/2026/feb/03/aid-cuts-avoidable-deaths-study-children-uk-us-donor-countries
20. The El Niño cometh https://www.theclimatebrink.com/p/the-el-nino-cometh
21. The Strongest El Niño Ever https://www.theclimatebrink.com/p/the-strongest-el-nino-ever
22. Kevin Trenberth – Comment https://www.theclimatebrink.com/p/the-strongest-el-nino-ever/comment/293970318
23. State of the climate: Strong El Niño puts 2026 on track for second-warmest year https://www.carbonbrief.org/state-of-the-climate-strong-el-nino-puts-2026-on-track-for-second-warmest-year/
24. World Meteorological Organization. (May 28, 2026). New report suggests more global temperature records ahead https://wmo.int/news/media-centre/new-report-suggests-more-global-temperature-records-ahead
25. James Hansen – Global Temperature in 2025, 2026, 2027 (December 18, 2025) https://jimehansen.substack.com/p/global-temperature-in-2025-2026-2027
26. James Hansen – Yes, 2026 is on Track to be the Hottest Year (June 12, 2026) https://jimehansen.substack.com/p/yes-2026-is-on-track-to-be-the-hottest
27. Zeke Hausfather – The Strongest El Niño Ever (July 13, 2026) https://www.theclimatebrink.com/p/what-drove-the-early-20th-century
28. Measuring the strength of El Niño – introducing Relative Niño indices  https://www.ecmwf.int/en/about/media-centre/science-blog/2026/measuring-strength-el-nino
29. Weather Impacts of ENSO  https://www.noaa.gov/jetstream/enso_impacts

• This post is in part based on Fexl – This El Niño Is Starting to Look Too Dangerous https://www.youtube.com/watch?v=Mqtt8Ln35t4
• Climate Reanalyzer – El Niño graphs https://climatereanalyzer.org/clim/sst_daily/?dm_id=nino3.4
• Climate.us – El Niño in summer 2026 https://www.climate.us/news-features/features/deep-pool-extremely-warm-water-available-fuel-el-nino-summer-2026
• WWF Coral Bleaching, Lizard Island, Great Barrier Reef (March 2016) youtube.com/watch?v=isRIlXNY1Jc

Related

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