People use fire extinguishers to put out a fire at the Pavilion of Countries in the Blue Zone at the United Nations Climate Change Conference (COP30) in Belem, Brazil, November 20, 2025. REUTERS/Douglas Pingituro
A firefighter stands next to a man removing a tent cover due to a fire alert during the UN Climate Change Conference (COP30), in Belem, Brazil, November 20, 2025. REUTERS/Adriano Machado
People use fire extinguishers to put out a fire at the Pavilion of Countries in the Blue Zone at the United Nations Climate Change Conference (COP30) in Belem, Brazil, November 20, 2025. REUTERS/Douglas Pingituro
A security guard gestures as people use fire extinguishers to put out a fire at the Pavilion of Countries in the Blue Zone at the United Nations Climate Change Conference (COP30) in Belem, Brazil, November 20, 2025. REUTERS/Douglas Pingituro
A man removes a tent cover due to a fire alert during the UN Climate Change Conference (COP30), in Belem, Brazil, November 20, 2025. REUTERS/Adriano Machado
People run during a fire at the Pavilion of Countries in the Blue Zone at the United Nations Climate Change Conference (COP30) in Belem, Brazil, November 20, 2025. REUTERS/Douglas Pingituro
United Nations Secretary-General Antonio Guterres attends a press conference, during the UN Climate Change Conference (COP30), in Belem, Brazil, November 20, 2025. REUTERS/Anderson Coelho

By Kate Abnett, Sudarshan Varadhan and Simon Jessop

BELEM, Brazil (Reuters) -Talks at the COP30 climate summit in Brazil were disrupted on Thursday after a fire broke out in the venue, triggering an evacuation just as negotiators were hunkering down to try to land a deal to strengthen international climate efforts.

United Nations Secretary-General Antonio Guterres had appealed earlier in the day for a deal from the summit, welcoming calls from some for clarity on the hotly disputed subject of weaning the world off fossil fuels.

Security footage showed flames breaking out at an exhibition pavilion and spreading rapidly up an internal fabric shell that lined the walls and ceiling of the building, before being extinguished. Delegates ran from the area as it filled with smoke.

Thirteen people were treated for smoke inhalation at the venue, organizers said. The local fire service said it was probably caused by electrical equipment, likely a microwave, and was controlled within six minutes.

Thousands of delegates were evacuated as security staff formed a human barrier across the hallway. The U.N. summit organisers said they would issue an update at 8 p.m. (2300 GMT) following a safety evaluation.

NEGOTIATING DEADLINES MISSED ALREADY

The summit in the Amazon city of Belem, Brazil, had already missed a self-imposed Wednesday deadline to secure agreement among the nearly 200 countries present on issues including how to increase climate finance and shift away from fossil fuels.

Brazil circulated a draft deal among governments on Thursday which did not include a roadmap on transitioning away from fossil fuels, two negotiators told Reuters, although the document is still being discussed.

Emissions from burning fossil fuels trap heat in the earth's atmosphere and are by far the biggest contributor to warming.

There are less than 48 hours until the scheduled end of the summit to find a consensus, which host nation Brazil has framed as a crucial step to ramping up international climate action and demonstrating that there is broad support to accelerate turning decades of promises and pledges from the COP summits into concrete action.

"One thing is clear, we are down to the wire, and the world is watching Belem," Guterres said.

FOSSIL FUEL RIFT

The two-week negotiation has become hung up on two issues - the future of fossil fuels and the delivery of climate finance - that expose criss-crossing fault lines between negotiating blocs from rich Western countries, oil producers and smaller states most vulnerable to climate change.

Taking their cue from Brazil, dozens of countries including both developed and developing nations have mounted a push for a roadmap setting out how countries should transition away from fossil fuels.

Others, including some fossil fuel-producing nations, are resisting.

The COP28 climate summit in 2023 agreed, after protracted discussion, to a transition, but nations have not mapped out how - or when - it will happen.

"I am perfectly convinced that a compromise is possible," Guterres added.

ADAPTING TO CHANGE

Another major sticking point in the negotiations is a reluctance among some richer nations to guarantee financing to help poorer countries adapt to a changing climate, according to three sources involved in the talks.

Developing countries are already deeply mistrustful of a $300 billion climate finance pledge made last year at the COP29 conference in Baku, particularly as the United States withdraws from climate cooperation under President Donald Trump.

Some existing climate finance has been directed to strange projects, including some that are funneling billions of dollars back to rich nations, according to previous Reuters reporting.

"Right now, our people are losing their lives and livelihoods from storms of unprecedented strength which are being caused by warming seas," said Steven Victor, Minister of Agriculture, Fisheries and the Environment for the Pacific island nation of Palau.

"If we leave Belem without a transformative outcome on adaptation for the world's most vulnerable, it will be a failure," he said.

European officials have said they agree adaptation financing is important, but that they were not authorized to agree to new targets.

(Additional reporting by Lisandra Paraguassu, Sudarshan Varadahn and William James, Editing by Richard Valdmanis, Andrew Cawthorne and Nia Williams)