Extreme Temperature Diary- Thursday September 24th, 2026/Main Topic: Last Major Speech by Outgoing U.N. Secretary António Guterres Emphasizes the Climate Crisis

Episode: 9/24/2026 — More info…

‘It’s my duty to tell the truth’: UN chief on the climate crisis, capitalism and reasons to be hopeful | António Guterres | The Guardian

António Guterres

‘It’s my duty to tell the truth’: UN chief on the climate crisis, capitalism and reasons to be hopeful

Before his final general assembly, António Guterres speaks about why he put climate at the centre of his UN tenure

António Guterres

Fiona Harvey

Fiona Harvey Environment editor

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António Guterres, who will finish his second term as UN secretary general on 31 December, has spoken out more strongly on the climate crisis than any of his predecessors. He has criticised “immoral” fossil fuel companies for their “grotesque greed”, warned that we have “opened the gates of hell” and hailed the new “clean energy age”.

Why are you so forthright on the climate crisis?

Climate is an existential threat. We see political leadership around the world diverted by lots of short-term objectives. Political life lives by the hour, and climate is something whose dramatic consequences will only be seen in the long term. That is why I believe the UN has the obligation to, at every moment, put the climate in the centre of the concerns of the international community, because climate is the most relevant global existential threat.


Why have we failed to tackle global heating up to now?

There are vested interests that are interested in maintaining the present development model based on fossil fuels. You have a systematic campaign that is strongly financed by the huge profits of the sector that tries to divert attention [from] the impacts of fossil fuels.

But also, most people have not yet interiorised the level of risk that we are all facing. I hope public opinion will be more and more impressed by the devastating impacts of climate change, and disasters becoming more and more dramatic. Heatwaves have terrible impacts on health, so there will be a growing consciousness of the devastating impacts of climate change as things get inevitably worse.

Is climate breakdown a threat to national security?

As the crisis in the Gulf has demonstrated, to base an economy on fossil fuel imports is a severe risk for any country, and security is something that tends to have an enormous importance in decision-making.

Scientists tell us we’re coming very close to tipping points that can dramatically accelerate the impacts of climate change. The Gulf Stream [or Amoc, Atlantic Meridional Overturning Circulation] is slowing, as we know. And we could face a huge acceleration of rising sea levels.

It will become a world problem, and it’s a clear security problem – an extremely dramatic problem for the security of all countries in the world.

Still in many security establishments, energy security is still seen in terms of fossil fuels. But there is a new generation of institutions and thinktanks alert to the risks of climate change and [the crisis in] biodiversity.


What difference can the UN secretary general make?

The secretary general of the UN has not much power, and there is no money. But there is one thing that I have: a voice. It’s my duty to use that voice without any compromise, to tell the truth and to alert the international community to the dangers it faces. I have not the power to all of a sudden make everybody invest in renewables, but I have the duty to tell people that unless we accelerate the transition from fossil fuels to renewables, unless we drastically reduce emissions in the next decade, we will be facing dramatic problems that will impact on the whole of humankind.

Have you any regrets about your 10 years in office?

We should have done more in building powerful alliances outside the traditional political spectrum. We should be able to do more building those alliances [with grassroots organisations and subnational and local governments]. We have given too much importance to our dialogue with the top political decision-makers and not done enough in the mobilisation of society and establishing a stronger alliance with local authorities.

Our democratic systems need to be modernised, and communication with the people, especially with young generations, needs to adapt to the new forms of communication [on the internet and social media].

Some people argue that capitalism is the underlying problem and we cannot solve the climate crisis without fixing that. Do you agree?

A market economy can be a very good form of allocation and resources. If you call capitalism the market economy, the problem is not capitalism. But a market economy requires effective governance. And that governance must be made through regulations, and that governance must be within the monopoly of political power, democratically elected.

So we can have a market economy – and I still believe it’s the best way to allocate resources, as planned economies didn’t prove to be effective – but we need to have regulatory frameworks established by politically democratic institutions. Unfortunately, in many circumstances we have seen regulatory bodies being controlled by private interests. We need to make sure that doesn’t happen.

But many of the biggest emitting countries, and countries with the biggest fossil fuel reserves, are autocracies. What can be done with them?

I’m in favour of democracies everywhere, but even in non-democratic regimes [tackling the climate crisis] is important – and it’s important that [modern communications] technologies are not used to increase the authoritarian nature of those regimes.


Are there any reasons to be hopeful?

Clearly we are not doing enough. But they are developing renewable energy at enormous speeds. The crisis of the Gulf will accelerate that trend, because many of the emerging economies that are the biggest emitters are net importers of fossil fuels and they have a vested interest in developing renewables.

Hurricanes are categorized by their wind speeds, but freshwater flooding is the deadliest hazard, a threat that is increasing in a warmer, wetter atmosphere because of human-caused climate change.cc @drjeffmasters.bsky.social / @climateconnections.bsky.social

— Anthony Edwards (@edwardsanthonyb.bsky.social) 2026-09-23T18:42:14.949Z

There is one solitary (and very literal) ray of sunshine amidst this gloom: the steady rise of #solar, #wind and #batteries. Clean energy trinity has broken out and expanded across the planet – the great uniting project of our time.www.theguardian.com/commentisfre…

— Dr Paul Dorfman (@drpauldorfman.bsky.social) 2026-09-24T08:50:15.236Z

A classic El Niño impact: below-average monsoon rains in India. We're seeing a -15% deficit this year.India's top 5 rainfall deficit years all were during El Niño:1877: -33%1899: -29%1918: -25%1972: -24%2009: -22%During moderate El Niño conditions in summer 2015, the deficit was -14%.

— Dr. Jeff Masters (@drjeffmasters.bsky.social) 2026-09-22T15:14:45.289Z

"It's warming of the Eastern Equatorial Pacific Ocean. That's it. That's what El Niño is. An unusually warm blob of water near the Galapagos Islands, 3,500 miles from California," Daniel Swain @weatherwest.bsky.social, @ucanr.edu climate scientist, told @jessicagarrison.bsky.social

— Pam Kan-Rice (@ucanrpam.bsky.social) 2026-09-23T18:31:13.267Z

You know what? If Trump et al. really cared about #nationalsecurity, they would be working hard to slow #climate change, which hundreds of defense and intelligence agency assessments (pre-Trump) have acknowledged are actual security threats. I document them here:www.gleick.com/blog/climate…

— Peter Gleick (@petergleick.bsky.social) 2026-09-23T20:38:59.803Z

Around two-thirds of the energy we put into today’s energy system ends up as rejected heat. So are we measuring the energy transition all wrong?cleaninguppod.substack.com/p/ep-275-the…

— Dr Paul Dorfman (@drpauldorfman.bsky.social) 2026-09-24T08:41:36.912Z

Elmo: “We all feel scared sometimes, but courage is when you feel scared but you still help others”@katharinehayhoe.com: “The most important thing to share, science actually shows, is that others care and there are solutions that work”

— Morgan (@lumorgan.bsky.social) 2026-09-23T19:57:49.147Z

From Western Mexico to Hawaii to the Mid-Atlantic and New England, flooding is the order of the week:yaleclimateconnections.org/2026/09/powe…

— Yale Climate Connections (@climateconnections.bsky.social) 2026-09-23T19:05:29.907Z

Seeing the lightning in the inner core of Polo become more widespread and completely enveloping the eye of this extreme storm is a thing of beauty.What's it called when the eyewall is completely enveloped in lightning? The Enveloped Eyewall Lightning Signature:nwafiles.nwas.org/file/nwafile…

— Chris Vagasky (@coweatherman.bsky.social) 2026-09-22T14:42:37.026Z

Forecast regarding soon-to-be major Hurricane Nolo (not to be confused w/current major Hurricane Polo) has become increasingly alarming. A close approach on Sat could bring extreme rainfall (>30 inches) to Big Island, w/risk of widespread & severe flash flooding & damaging winds.

— Daniel Swain (@weatherwest.bsky.social) 2026-09-23T22:07:36.000Z

Major Nor’easter! Also, Cat 5 Hurricane #Polo in context. And “Cool” #Florida weekend! It’s all packed into this short video. #noreaster

— Jeff Berardelli (@weatherprof.bsky.social) 2026-09-24T13:28:41.612Z

99.9th Percentile +The rapid intensification of #Polo sits solidly in 4-sigma (standard deviation) territory consistent with the top 5 of 4,500 RI storms globally since 1980.

— Jeff Berardelli (@weatherprof.bsky.social) 2026-09-23T20:13:11.230Z

Supercharged Pacific, Super Slow Atlantic!🌀 It’s truly night& day in the Atlantic vs the Pacific, with Atlantic Cyclone Energy at a record low, while the Pacific is vying for a record high! ACE is the accumulated cyclone energy when combining all the storm’s intensity and longevity in each basin.

— Jeff Berardelli (@weatherprof.bsky.social) 2026-09-24T12:59:53.801Z

Germany pledges to phase out fossil fuels for first time with target of 2045.www.theguardian.com/environment/…

— Dr Paul Dorfman (@drpauldorfman.bsky.social) 2026-09-24T08:02:43.198Z

Converter stations for the world’s largest offshore #wind farm, located 75 miles off the county’s coastline, transform clean power before sent to UK via cables.www.edp24.co.uk/news/2657048…

— Dr Paul Dorfman (@drpauldorfman.bsky.social) 2026-09-24T08:45:43.244Z

#China #battery can be charged in under five minutes in challenge to dominance of CATL and BYD in #EV battery race. www.ft.com/content/8d8e…

— Dr Paul Dorfman (@drpauldorfman.bsky.social) 2026-09-24T09:05:30.705Z

Public surveys in Germany reveal supporters of far-right Alternative für Deutschland (AfD) less willing to adopt electric vehicles and solar panels.www.nature.com/articles/s41…

— Dr Paul Dorfman (@drpauldorfman.bsky.social) 2026-09-24T09:46:52.798Z

Who will foot the bill? Tripling #nuclear power more expensive than optimised #renewables in Finland.Tripling nuclear power is more expensive than optimised renewables in Finland.Renewables meet energy demand more cost-effectively and avoid nuclear risks.www.sciencedirect.com/science/arti…

— Dr Paul Dorfman (@drpauldorfman.bsky.social) 2026-09-24T09:27:29.964Z

Germany sets out plan to phase out fossil fuels by 2045The plans include ramping up renewable energy from 55% to 80% of electricity generation by 2030, with an additional 12GW of onshore wind, and a target of 215GW of solar energy by 2030. www.dw.com/en/germany-s…

— Dr Paul Dorfman (@drpauldorfman.bsky.social) 2026-09-24T09:09:01.763Z

Recent flyovers by unidentified drones in Luxembourg – Greenpeace urges government review security measures for extended operation of Cattenom #nuclear power plant. today.rtl.lu/news/luxembo…

— Dr Paul Dorfman (@drpauldorfman.bsky.social) 2026-09-24T08:35:39.514Z

Just how much power will #AI need?Aggregate power consumption of data centres has kept rising fast — by 17% in 2025 alone, says the IEA, which projects that the figure will double from that level by 2030.www.ft.com/content/3ace…

— Dr Paul Dorfman (@drpauldorfman.bsky.social) 2026-09-24T08:07:05.344Z

#AI data centres water impact.Office for Environmental Protection CEO says UK faces “very serious water resilience issue", warning serious supply pressure in water-stressed regions.www.thetimes.com/uk/politics/…

— Dr Paul Dorfman (@drpauldorfman.bsky.social) 2026-09-24T08:13:11.124Z

#AI agent "infiltrated" statistics portal on Australian government website. Agent hacked statistics portal containing private data from #Australia's universal healthcare scheme, Medicare. Experts believe it is the world's first known AI breach of a govt system. www.bbc.co.uk/news/live/cv…

— Dr Paul Dorfman (@drpauldorfman.bsky.social) 2026-09-24T09:03:25.417Z

Last week, Earth Fire Alliance released first light images from the initial handful of FireSats. A constellation designed to monitor fire, globally, in near real time. earthfirealliance.org/news-article…The data are stunning, with 5 bands measuring 4 different wavelengths.

— Robert Simmon (@rsimmon.bsky.social) 2026-09-24T17:34:16.252Z

Radar image of Tuesday's mass crane migration. A 100 km long line of migrating cranes was clearly visible on weather radar. It is estimated that around 10,000 (?) cranes were involved in that formation. The highest count observed was 26,000 migrating cranes on that day in Kangasala (near Tampere).

— Mika Rantanen (@mikarantane.bsky.social) 2026-09-24T13:20:20.138Z

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