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Sensors can read your sweat and predict overheating. Here's why privacy advocates care

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Sensors can read your sweat and predict overheating. Here's why privacy advocates care

On a hot summer day in Oak Ridge, Tennessee, dozens of men removed pipes, asbestos and hazardous waste while working to decontaminate a nuclear facility and prepare it for demolition.

Dressed in head-to-toe coveralls and fitted with respirators, the crew members toiling in a building without power had no obvious respite from the heat. Instead, they wore armbands that recorded their heart rates, movements and exertion levels for signs of heat stress.

Stephanie Miller, a safety and health manager for a U.S. government contractor doing cleanup work at the Oak Ridge National Laboratory, watched a computer screen nearby. A color-coding system with little bubbles showing each worker’s physiological data alerted her if anyone was in danger of overheating.

“Heat is one of the greatest risks that we have in this work, even though we deal with high radiation, hazardous chemicals and heavy metals,” Miller said.

As the world experiences more record high temperatures, employers are exploring wearable technologies to keep workers safe. New devices collect biometric data to estimate core body temperature – an elevated one is a symptom of heat exhaustion – and prompt workers to take cool-down breaks.

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The devices, which were originally developed for athletes, firefighters and military personnel, are getting adopted at a time when the Atlantic Council estimates heat-induced losses in labor productivity could cost the U.S. approximately $100 billion annually.

This article is part of AP’s Be Well coverage, focusing on wellness, fitness, diet and mental health. Read more Be Well.

But there are concerns about how the medical information collected on employees will be safeguarded. Some labor groups worry managers could use it to penalize people for taking needed breaks.

“Any time you put any device on a worker, they’re very concerned about tracking, privacy, and how are you going to use this against me,” said Travis Parsons, director of occupational safety and health at the Laborers’ Health and Safety Fund of North America. “There’s a lot of exciting stuff out there, but there’s no guardrails around it.”

VULNERABLE TO HEAT

At the Tennessee cleanup site, the workers wearing heat stress monitors made by Atlanta company SlateSafety are employed by United Cleanup Oak Ridge. The company is a contractor of the U.S. Department of Energy, which has rules to prevent on-the-job overheating.

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But most U.S. workers lack protections from extreme heat because there are no federal regulations requiring them, and many vulnerable workers don’t speak up or seek medical attention. In July, the Biden administration proposed a rule to protect 36 million workers from heat-related illnesses.

From 1992 to 2022, 986 workers died from heat exposure in the U.S., according to the Environmental Protection Agency. Experts suspect the number is higher because a coroner might not list heat as the cause of death if a sweltering roofer takes a fatal fall.

Setting occupational safety standards can be tricky because individuals respond differently to heat. That’s where the makers of wearable devices hope to come in.

HOW WEARABLE HEAT TECH WORKS

Employers have observed workers for heat-related distress by checking their temperatures with thermometers, sometimes rectally. More recently, firefighters and military personnel swallowed thermometer capsules.

“That just was not going to work in our work environment,” Rob Somers, global environment, health and safety director at consumer product company Perrigo, said.

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Instead, more than 100 employees at the company’s infant formula plants were outfitted with SlateSafety armbands. The devices estimate a wearer’s core body temperature, and a reading of 101.3 degrees triggers an alert.

Another SlateSafety customer is a Cardinal Glass factory in Wisconsin, where four masons maintain a furnace that reaches 3000 degrees Fahrenheit.

“They’re right up against the face of the wall. So it’s them and fire,” Jeff Bechel, the company’s safety manager, said.

Cardinal Glass paid $5,000 for five armbands, software and air-monitoring hardware. Bechel thinks the investment will pay off; an employee’s two heat-related emergency room visits cost the company $15,000.

Another wearable, made by Massachusetts company Epicore Biosystems, analyzes sweat to determine when workers are at risk of dehydration and overheating.

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“Until a few years ago, you just sort of wiped (sweat) off with a towel,” CEO Rooz Ghaffari said. “Turns out there’s all this information packed away that we’ve been missing.”

Research has shown some devices successfully predict core body temperature in controlled environments, but their accuracy remains unproven in dynamic workplaces, according to experts. A 2022 research review said factors such as age, gender and ambient humidity make it challenging to reliably gauge body temperature with the technology.

The United Cleanup Oak Ridge workers swathed in protective gear can get sweaty even before they begin demolition. Managers see dozens of sensor alerts daily.

Laborer Xavier Allison, 33, was removing heavy pieces of ductwork during a recent heat wave when his device vibrated. Since he was working with radioactive materials and asbestos, he couldn’t walk outside to rest without going through a decontamination process, so he spent about 15 minutes in a nearby room which was just as hot.

“You just sit by yourself and do your best to cool off,” Allison said.

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The armband notifies workers when they’ve cooled down enough to resume work.

“Ever since we implemented it, we have seen a significant decrease in the number of people who need to get medical attention,” Miller said.

COLLECTING PERSONAL DATA

United Cleanup Oak Ridge uses the sensor data and an annual medical exam to determine work assignments, Miller said. After noticing patterns, the company sent a few employees to see their personal physicians, who found heart issues the employees hadn’t known about, she said.

At Perrigo, managers analyze the data to find people with multiple alerts and speak to them to see if there’s “a reason why they’re not able to work in the environment,” Somers said. The information is organized by identification numbers, not names, when it goes into the company’s software system, he said.

Companies keeping years of medical data raises concerns about privacy and whether bosses may use the information to kick an employee off a health plan or fire them, said Adam Schwartz, privacy litigation director at the Electronic Frontier Foundation.

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“The device could hurt, frankly, because you could raise your hand and say ‘I need a break,’ and the boss could say, ‘No, your heart rate is not elevated, go back to work,’” Schwartz said.

To minimize such risks, employers should allow workers to opt in or out of wearing monitoring devices, only process strictly necessary data and delete the information within 24 hours, he said.

Wearing such devices also may expose workers to unwanted marketing, Ikusei Misaka, a professor at Tokyo’s Musashino University, said.

A PARTIAL SOLUTION

The National Institute for Occupational Safety and Health advises employers to institute a plan to help workers adjust to hot conditions and to train them to recognize signs of heat-related illness and to administer first aid. Wearable devices can be part of efforts to reduce heat stress, but more work needs to be done to determine their accuracy, said Doug Trout, the agency’s medical officer.

The technology also needs to be paired with access to breaks, shade and cool water, since many workers, especially in agriculture, fear retaliation for pausing to cool off or hydrate.

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“If they don’t have water to drink, and the time to do it, it doesn’t mean much,” Juanita Constible, senior advocate at the National Resources Defense Council, said. “It’s just something extra they have to carry when they’re in the hot fields.”

___

Yuri Kageyama in Tokyo contributed to this report.

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Video: Deadly Storm Causes Massive Flooding Across Gaza

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Video: Deadly Storm Causes Massive Flooding Across Gaza

new video loaded: Deadly Storm Causes Massive Flooding Across Gaza

Nearly 795,000 displaced people in Gaza were at risk of dangerous floodwaters, according to the United Nations. The heavy rain and strong winds flooded makeshift shelters and collapsed several buildings, according to the Gaza Civil Defense.

By Jorge Mitssunaga, Nader Ibrahim and Saher Alghorra

December 12, 2025

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Archaeologists uncover rare fresco of Jesus in town Pope Leo XIV recently visited

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Archaeologists uncover rare fresco of Jesus in town Pope Leo XIV recently visited

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Archaeologists in Turkey have discovered a fresco of a Roman-looking Jesus as the “Good Shepherd,” which is being hailed as one of the most important finds from Anatolia’s early Christian era.

The work of art was found in August in an underground tomb near the town of Iznik, where the Nicene Creed, a foundational statement of Christian belief, was adopted in A.D. 325. The tomb itself is believed to date back to the third century, when the area was still under the Roman Empire and Christians faced persecution.

POPE LEO XIV OPENS FIRST FOREIGN TRIP IN TURKEY WITH A VISIT TO CHRISTIANITY’S EARLY HEARTLANDS

Archaeologists clean and restore frescoes inside a 3rd-century tomb where a rare early Christian depiction of Jesus as the “Good Shepherd” was discovered, in Iznik, Turkey, Friday, Dec. 12, 2025. (Khalil Hamra/AP Photo)

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The fresco shows a youthful, clean-shaven Jesus dressed in a toga and carrying a goat on his shoulders, according to The Associated Press, which was the first international media organization given access to the tomb. The outlet noted that researchers say the fresco represents one of the rare instances in Anatolia in which Jesus is portrayed with Roman attributes.

The lead archaeologist on the project believes the artwork could be the “only example of its kind in Anatolia,” the AP reported.

A fresco depicting Jesus as the “Good Shepherd” adorns the wall of a 3rd-century tomb in Hisardere, where archaeologists uncovered one of Anatolia’s best-preserved early Christian artworks, in Iznik, Turkey, Friday, Dec. 12, 2025. (Khalil Hamra/AP Phto)

POPE LEO XIV CALLS FOR ‘DIVINE GIFT OF PEACE’ IN MAIDEN VISIT TO MIDDLE EAST

Pope Leo XIV recently visited the town as part of his first overseas trip since taking the helm of the Vatican. While in Iznik, Pope Leo XIV marked the 1,700th anniversary of the Council of Nicaea, which set forth the Nicene Creed that millions of Christians still read today.

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Turkish President Recep Tayyip Erdogan (L) welcomes Pope Leo XIV (R) with an official welcoming ceremony at the Presidential Complex in Ankara, Turkiye, on Nov. 27, 2025.  (Utku Ucrak/Anadolu via Getty Images)

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Turkish President Recep Tayyip Erdoğan presented a tile painting of the “Good Shepherd” discovery to the pope, according to the AP.

While in Turkey, Pope Leo XIV was joined by Eastern and Western patriarchs and priests as they prayed that Christians would one day be united once again. They prayed together over the site where the council produced the Nicene Creed. The men recited the creed, which the pope said was “of fundamental importance in the journey that Christians are making toward full communion,” according to the AP.

The Associated Press contributed to this report.

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Three years on, former MEP Kaili remains in limbo still awaiting trial

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Three years on, former MEP Kaili remains in limbo still awaiting trial

The detention of former EU foreign policy chief Federica Mogherini earlier this month in a fraud investigation in Belgium has raised fresh questions about why suspects in the European Parliament’s corruption scandal still have not faced trial, three years after arrests that shocked Brussels.

Mogherini, who led the EU’s diplomatic service from 2014 to 2019 and then served as rector of the prestigious College of Europe, was questioned alongside two others on suspicion of alleged procurement fraud, corruption and conflict of interest related to an EU-funded diplomatic training programme.

The Italian top diplomat, who was eventually released pending charges, has since resigned from her post at the College of Europe.

Meanwhile, the protracted European Parliament corruption scandal investigation, which began with raids across Brussels on 9 December 2022, has moved at a glacial pace.

Greek MEP Eva Kaili became the face of the scandal when Belgian police revealed it had discovered €150,000 in cash — purportedly in large bags — at her Brussels residence during the raids.

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Since then, Kaili has spent the intervening years in a legal purgatory, or what some have since dubbed “Belgiangate”.

Brussels rocked by Parliament sting

Authorities said they discovered a total of €1.5 million in cash during the 2022 sting, including €600,000 at the home of former Italian MEP Antonio Panzeri and the money found at the Brussels residence of Kaili, who was also serving as one of 14 vice presidents of the European Parliament at the time.

Kaili’s father Alexandros was apprehended at the Sofitel hotel at Place Jourdan with a suitcase containing “several hundred thousand euros,” according to authorities.

A special police team accompanied by investigating judge Michel Claise then raided Kaili’s home that evening, arresting her in front of her two-year-old daughter.

Stripped of her parliamentary immunity, Kaili spent four months in pre-trial detention followed by house arrest with an electronic bracelet until May 2023, all while maintaining her innocence in what prosecutors allege was a scheme by three non-EU countries to buy influence in the European Parliament.

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She remains charged with participation in a criminal organisation, corruption and money laundering.

The 47-year-old former MEP has consistently denied all charges. Her partner Francesco Giorgi, a parliamentary assistant and former aide to Panzeri, admitted accepting bribes but alleged Kaili was not directly involved in the corruption scheme. He is the father of Kaili’s daughter.

Byzantine court drama

The case centres on allegations that Qatar, Morocco and Mauritania sought to influence European Parliament decisions through bribes paid to MEPs and staff. Authorities say the scheme aimed to kill off parliamentary resolutions condemning Qatar’s human rights record and secure visa liberalisation for Qatari citizens. Both Qatar and Morocco deny the allegations.

Panzeri struck a deal with prosecutors in January 2023 to become a cooperating witness in exchange for a reduced sentence. Under the agreement, he committed to revealing “the identity of the persons he admits to having bribed.”

Defence lawyers have challenged Panzeri’s credibility and the methods used to secure his confession.

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The case took another hit after Claise, the investigating judge who ordered Kaili’s arrest, was forced to recuse himself in June 2023 after it emerged his son was a business partner of Belgian MEP Marie Arena’s son — Arena herself later charged in the scandal.

Defence lawyers claim Claise knew about these connections and should have recused himself earlier, and that he protected Arena by delaying her indictment.

Marie Arena was charged only in January with participation in a criminal organisation but not with corruption or money laundering. Police found €280,000 in cash at her son’s home, according to Belgian media reports.

Another significant development came in September 2024 when a Brussels judge ordered Committee R, an independent body overseeing Belgian intelligence, to review the legality of “specific and exceptional methods” used by Belgian secret service VSSE in the investigation.

“It’s a very important and extraordinary decision that the appeal court made,” Kaili’s lawyer Sven Mary told Euronews at the time, adding that the finding could open a “new Pandora’s box” about the role Belgian intelligence played.

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The Committee had issued an opinion in January confirming that the VSSE acted within the law. However, defence lawyers pointed out that Belgium’s penal code was not amended to criminalise foreign interference until April 2024 — a year and a half after the raids. At the time of the original investigation, only military espionage qualified as a prosecutable offence of interference.

Kaili has also challenged other parts of the investigation, arguing that Belgian authorities subjected her to “medieval” conditions during detention.

Her lawyers claimed she was held in solitary confinement for three days in January 2023 without adequate blankets, with lights on continuously, which they described as “torture”. Belgian prosecutors disputed these claims.

Case known as Belgiangate?

The procedural challenges facing the investigation are substantial. Defence lawyers have questioned the case on multiple fronts, including how Kaili’s immunity was lifted, the role of Belgian intelligence services, and the credibility of key witness Antonio Panzeri.

A crucial dispute centres on whether investigators artificially created a flagrant delicto situation. When Kaili’s father was arrested carrying a suitcase of cash on 9 December 2022, Judge Claise used this to justify an immediate search of Kaili’s home.

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Defence lawyers argue immunity can only be lifted when someone is caught in the act, and that investigators manufactured these conditions specifically to bypass her parliamentary protections.

Questions about Panzeri’s reliability intensified after Giorgi secretly recorded an investigator saying, “Panzeri is lying.”

The recording, revealed by Belgian outlet La Libre, is said to have captured the investigator repeatedly questioning the credibility of the man Belgian authorities consider the scheme’s mastermind.

Prosecutors want the recording excluded, citing “unclear” circumstances. Defence lawyers insist it proves Panzeri’s cooperation agreement was granted too hastily and should have required court approval.

In September 2024, Kaili and Giorgi filed a defamation complaint against Panzeri with prosecutors in Milan.

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In July of this year, Kaili won a legal victory when the EU’s General Court ruled that the European Parliament had wrongly denied her access to documents about her alleged mismanagement of parliamentary assistant allowances, part of an EPPO claim.

All still in limbo

The case has expanded significantly since the initial arrests. In March, prosecutors requested that parliamentary immunity be waived for Italian S&D MEPs Elisabetta Gualmini and Alessandra Moretti.

In total, at least 10 people now face charges, including former MEPs Panzeri, Cozzolino and Marc Tarabella, as well as lobbyist Niccolò Figà-Talamanca and Luca Visentini, general secretary of the International Trade Union Confederation.

The Brussels Chamber of Indictment only began reviewing the legality of the investigation this week, with hearings involving more than 20 parties to the case.

Kaili, who did not seek re-election in 2024, now lives in Italy and Greece, where authorities froze her assets shortly after her arrest, while it remains unlikely a trial will begin before late 2026 at the earliest.

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