HAVANA: Months of investigations into so-called sonic attacks on American diplomats in Cuba, which have soured Washington-Havana relations for most of the past year, have turned up nothing.
Cuba said last week it found no evidence to support US claims that several American diplomats in Havana were harmed in what US Secretary of State Rex Tillerson called surreptitious “health attacks.”
In a saga seemingly ripped from the pages of a Cold War spy novel, at least 21 US officials and a smaller number of Canadians have received treatment for a variety of symptoms including brain trauma and hearing loss.
Questions linger over whether they are the result of targeted attacks, sabotage, or an accident.
Suspicions were first aroused in late 2016, but Washington waited until August 2017 to announce that several of its embassy employees had fallen victim to mystery health problems that remain unexplained.
US officials have told reporters they believe some kind of inaudible sound weapon was used on its staff either inside or outside their residences in Havana.
The labor union representing US diplomats said their diagnoses of those treated included mild traumatic brain injury and permanent hearing loss.
On September 14, the number of employees affected was 21, with the latest incident being reported last month, US officials said, adding that monitoring of their staff in Havana was ongoing.
A source close to the Canadian embassy told AFP that more than five families had been affected, including several children, but that none of those cases appeared to be serious.
Washington expelled two Cuban diplomats in May and Tillerson raised the possibility of closing the US mission.
Cuban Foreign Minister Bruno Rodriguez Parrilla warned against that move, saying: “It would be unfortunate if a matter of this nature is politicized.”
“With so many families affected at the same time, it’s not trivial,” said the source close to the embassy. “It cannot be a coincidence.”
Using an inaudible sound device for a stealth attack “is quite plausible from a technical point of view,” said Denis Bedat, a specialist in bio-electromagnetics.
“Ultrasonic waves, beyond the acoustic capacity of humans, can be broadcast with an amplifier, and the device does not need to be large, or used inside or outside a house,” the French expert said.
He cited the example of the Active Denial System (ADS), an anti-riot gun used by US police forces that pulses out electromagnetic waves that produces a sudden unbearable burning sensation.
It is unclear who would have carried out such an attack, and for what ends.
Numerous observers doubt that Cuba would risk antagonizing its neighbors at the end of 2016 — when relations between the former Cold War enemies were thawing, before they deteriorated under President Donald Trump.
Likewise Canada, the biggest source of big-spending tourists to Cuba. According to Canadian diplomats, Ottawa does not suspect senior Cuban officials of involvement.
Rumors are rife on both sides of the Florida Strait, including a plot by rogue Cuban agents aiming to derail rapprochement with Washington.
Others suspect a third country with the same aims, such as Russia or North Korea.
But the most common hypothesis is that the health issues may be purely accidental, an unfortunate consequence of defective and outdated listening systems — a theory reinforced by Cuba’s reputation for having “big ears.”
Several experts undermine that view however, saying eavesdropping systems are typically receptors, and not emitters, of signals. And, according to US media, investigators have turned up nothing suspicious in meticulous searches of the victims’ residences.
“We have no definitive answer on the origin or the cause of the incidents,” a State Department official said on Tuesday.
Havana meanwhile said that it had taken additional measures to protect American diplomats and their families.
“The issue is that there are people who are not doing well,” the source said. “And we still do not know why.”
Cuba sonic mystery deepens after fruitless probes
Cuba sonic mystery deepens after fruitless probes
2025 among world’s three hottest years on record, WMO says
- All eight datasets confirmed that the last three years were the planet’s three hottest since records began, the WMO said
- The slight differences in the datasets’ rankings reflect their different methodologies and types of measurements
BRUSSELS: Last year was among the planet’s three warmest on record, the World Meteorological Organization said on Wednesday, as EU scientists also confirmed average temperatures have now exceeded 1.5 degrees Celsius of global warming for the longest since records began.
The WMO, which consolidates eight climate datasets from around the world, said six of them — including the European Union’s European Center for Medium-Range Weather Forecasts (ECMWF) and the British national weather service — had ranked 2025 as the third warmest, while two placed it as the second warmest in the 176-year record.
All eight datasets confirmed that the last three years were the planet’s three hottest since records began, the WMO said. The warmest year on record was 2024.
THREE-YEAR PERIOD ABOVE 1.5 C AVERAGE WARMING LEVEL
The slight differences in the datasets’ rankings reflect their different methodologies and types of measurements — which include satellite data and readings from weather stations.
ECMWF said 2025 also rounded out the first three-year period in which the average global temperature was 1.5 C above the pre-industrial era — the limit beyond which scientists expect global warming will unleash severe impacts, some of them irreversible.
“1.5 C is not a cliff edge. However, we know that every fraction of a degree matters, particularly for worsening extreme weather events,” said Samantha Burgess, strategic lead for climate at ECMWF.
Burgess said she expected 2026 to be among the planet’s five warmest years.
CHOICE OF HOW TO MANAGE TEMPERATURE OVERSHOOT
Governments pledged under the 2015 Paris Agreement to try to avoid exceeding 1.5 C of global warming, measured as a decades-long average temperature compared with pre-industrial temperatures.
But their failure to reduce greenhouse gas emissions means that target could now be breached before 2030 — a decade earlier than had been predicted when the Paris accord was signed in 2015, ECMWF said. “We are bound to pass it,” said Carlo Buontempo, director of the EU’s Copernicus Climate Change Service. “The choice we now have is how to best manage the inevitable overshoot and its consequences on societies and natural systems.”
Currently, the world’s long-term warming level is about 1.4 C above the pre-industrial era, ECMWF said. Measured on a short-term basis, average annual temperatures breached 1.5 C for the first time in 2024.
EXTREME WEATHER
Exceeding the long-term 1.5 C limit would lead to more extreme and widespread impacts, including hotter and longer heatwaves, and more powerful storms and floods. Already in 2025, wildfires in Europe produced the highest total emissions on record, while scientific studies confirmed specific weather events were made worse by climate change, including Hurricane Melissa in the Caribbean and monsoon rains in Pakistan which killed more than 1,000 people in floods.
Despite these worsening impacts, climate science is facing political pushback. US President Donald Trump, who has called climate change “the greatest con job,” last week withdrew from dozens of UN entities including the scientific Intergovernmental Panel on Climate Change.
The long-established consensus among the world’s scientists is that climate change is real, mostly caused by humans, and getting worse. Its main cause is greenhouse gas emissions from burning fossil fuels like coal, oil and gas, which trap heat in the atmosphere.
