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PolyU scholars pioneer smart and sustainable personal cooling technologies to address global extreme heat

Researchers at PolyU are pioneering next-generation personal cooling solutions using advanced textiles and intelligent wearables. Their innovations include spectrum-selective textiles, thermal insulation, ventilative and evaporative cooling, and AI-driven frameworks that deliver personalized, energy-efficient cooling.

Submerging forearms in water may help protect older adults during extreme heat

A new study from Penn State researchers found that submerging hands and forearms in room-temperature tap water can effectively cool older adults and reduce their heart rate during extreme heat. The study demonstrated a reduction in core body temperature by about half a degree Fahrenheit, which may help prevent heat-related illnesses.

SourcePenn State·JournalExperimental Physiology·TypeExperimental study·DateSep 17, 2025

Rising heat waves tied to fossil fuel and cement production

Research by ETH Zurich reveals human-induced climate change has increased extreme heat wave frequency and severity, with fossil fuel and cement production contributing significantly. The study highlights the responsibility of large carbon emitters, such as oil and gas companies, in exacerbating heat waves.

SourceETH Zurich·JournalNature·TypeSystematic review·DateSep 10, 2025

Unprecedented heat in North China: how soil moisture amplified 2023's record heatwave

A new study reveals that a combination of large-scale atmospheric circulation and strong soil moisture feedback contributed to North China's record-breaking three-day heatwave in late June 2023. The study found that the extreme heat was amplified by an unusually dry season, with temperatures soaring past 40°C in some areas.

Barcelona could suffer heat waves up to 6ºC more intense by the end of the century

A study predicts that Barcelona will experience extreme and dry heat periods with temperature increases of up to 4ºC and a general reduction in relative humidity. The research forecasts an increase in average maximum temperatures of 4ºC and average minimum temperatures of 3.5ºC if greenhouse gas emissions are not drastically reduced.

SourceUniversitat Autonoma de Barcelona·JournalJournal of Geophysical Research Atmospheres·TypeData/statistical analysis·DateJul 17, 2025

Climate change cuts milk production, even when farmers cool their cows

A recent study published in Science Advances found that extreme heat can reduce milk production by up to 10% and even when farmers use cooling technologies. The researchers analyzed data from over 130,000 Israeli dairy cows and surveyed more than 300 dairy farmers to understand the impact of climate change on milk supply.

SourceThe Hebrew University of Jerusalem·JournalScience Advances·TypeObservational study·DateJul 4, 2025

Rethinking how we study the impact of heat on heart health

A new meta-analysis of over 400 laboratory studies involving more than 6,800 participants highlights the effects of different heating methods on heart performance under heat stress. The study shows that exposure to encapsulated heating methods can lead to significantly increased heart rates and cardiac strain.

SourceUniversity of Ottawa·JournalNature Communications·TypeMeta-analysis·DateMar 19, 2025

Burden of cardiovascular disease caused by extreme heat in Australia to more than double by 2050

Research published in the European Heart Journal suggests that Australia's burden of cardiovascular disease caused by extreme heat will more than double by 2050. The study found that hot weather costs around 49,483 years of healthy life annually, with this number expected to increase significantly under climate change scenarios.

SourceEuropean Society of Cardiology·JournalEuropean Heart Journal·TypeObservational study·DateMar 16, 2025

Fans ineffective in heat waves

A recent study found that electric fans provide little cooling relief for older adults indoors during extreme heat due to their limited sweat production. Dr. Fergus O'Connor from Griffith University suggests using air conditioning at a higher temperature in conjunction with a fan to provide effective cooling and reduce operating costs.

SourceGriffith University·JournalJAMA·TypeObservational study·DateJan 30, 2025

Worsening heat waves pose unique risks to people living with neurodegenerative disease

Worsening heat waves exacerbate symptoms of neurodegenerative diseases like Parkinson's and dementia due to impaired sweating and blood flow. Doctors can take proactive steps by regularly screening for social isolation, providing resources, and utilizing telemedicine to monitor high-risk patients.

SourceUniversity of California - Los Angeles Health Sciences·JournalJAMA Neurology·TypeCommentary/editorial·DateDec 17, 2024

Milan under stress due to heat waves: study reveals districts most at risk of cardiovascular emergencies

A study by Politecnico di Milano reveals districts most at risk of cardiovascular emergencies during heat waves in Milan. The research found that 23% of the city's population in 18 vulnerable districts face a 22% increased risk, while 20 low-vulnerability districts show no significant increase.

SourcePolitecnico di Milano·JournalPopulation and Environment·TypeData/statistical analysis·DateDec 10, 2024

Using AI to link heat waves to global warming

A new AI approach accurately links heat waves to global warming, estimating that record-setting heat waves could occur multiple times per decade under higher warming levels. The method uses actual historical weather data and machine learning to predict the magnitude of extreme events.

SourceStanford University·JournalScience Advances·DateAug 21, 2024

Most existing heat wave indices fail to capture heat wave severity

Researchers found that five out of six existing heat-wave indices were unable to capture the severity and spatial distribution of recent lethal heat waves in India, Spain, and the USA. The lethal heat-stress index was better able to identify dangerous heat-stress conditions, particularly in low-humidity regions.

SourceCell Press·JournalNexus·TypeComputational simulation/modeling·DateAug 7, 2024

Preventing heat stroke in tennis: insights into the heat environments of tennis courts

Researchers investigated the thermal environments of various tennis court surfaces, revealing significant differences in wet-bulb globe temperature (WGBT) values. The study suggests that on-site WBGT measurements are crucial for effective heat management in sports, and organizers should consider reducing match frequency in hot conditions.

SourceDoshisha University·JournalScientific Reports·TypeObservational study·DateAug 6, 2024

Pacific cod can’t rely on coastal safe havens for protection during marine heat waves, OSU study finds

A new Oregon State University study found that young Pacific cod in near shore safe havens were severely affected by recent marine heat waves in the Gulf of Alaska. The researchers estimated that only the largest 15-25% of the island's cod population survived, leading to significant changes in abundance, growth rates and diet.

SourceOregon State University·JournalScientific Reports·TypeData/statistical analysis·DateJun 27, 2024

Public more confident connecting increasing heat, wildfires with climate change than other extreme weather events, study finds

A recent study by Oregon State University found that US adults are fairly confident in linking wildfires and heat to climate change, but less so for hurricanes, flooding, or tornadoes. The survey also revealed significant differences in responses based on politics, personal experience, and demographics.

SourceOregon State University·JournalClimatic Change·TypeSurvey·DateJun 13, 2024

PolyU study reveals effectiveness of GBGI infrastructure in mitigating urban heat, proposing nine-stage framework for development of a sustainable city

The study found that green infrastructures such as botanical gardens, wetlands, and street trees are effective in cooling urban heat, with temperature reductions ranging from 9.63°C to 17.7°C. A nine-stage framework has been proposed to facilitate GBGI implementation and maximize benefits.

SourceThe Hong Kong Polytechnic University·JournalThe Innovation·DateMay 23, 2024

Study led by ORNL informs climate resilience strategies in urban, rural areas

A new study led by ORNL provides valuable insights into vegetation resilience in response to extreme heat events, informing pathways for climate mitigation. The analysis found that impervious surfaces, moisture conditions, and type of land cover affect vegetation resilience, with preservation and enhancement of vegetation contributing ...

SourceDOE/Oak Ridge National Laboratory·JournalPNAS Nexus·TypeData/statistical analysis·DateMay 8, 2024