South Korean companies are fundamentally restructuring their workplace operations to combat an unprecedented heat crisis, extending lunch breaks, introducing frequent rest cycles, and deploying cooling technology on an unprecedented scale. Yet beneath these corporate adaptations lies a troubling reality: major employers with substantial resources are securing protection for their workforce, while smaller businesses and migrant labourers working outdoors remain exposed to dangerous conditions. The contrast exposes how extreme weather affects workers across the economic spectrum differently, with consequences that could reshape labour protections across East Asia.
The catalyst for this shift is staggering. Yangsan in South Gyeongsang Province recorded a scorching 42.5 degrees Celsius, while Seoul endured multiple days under the nation's highest-level heatwave warning. This is not gradual warming but abrupt climatic shock, and the human cost is becoming impossible to ignore. The Korea Workers' Compensation and Welfare Service has documented 195 heat-related workplace incidents between 2022 and June 2024, including 20 fatalities. Most alarmingly, thirteen cases—four fatal—had already been recognised by the end of June, before the typically deadlier peak season of July and August arrives. These figures suggest a worsening trend that will likely accelerate as summer intensifies.
Legal accountability has become a driving force. A district court conviction last year of a construction company under the Serious Accidents Punishment Act for a worker's heatstroke death marked a watershed moment—the first such prosecution under the stringent law. This legal precedent has sent clear signals to industry: heat-related deaths now carry genuine criminal liability, not merely financial penalties. The construction sector, already accounting for a disproportionate share of industrial fatalities, has responded most aggressively, recognising that operational changes are now an existential business requirement alongside moral obligation.
Large construction firms have pioneered innovative protective measures. Hyundai Engineering & Construction incentivises workers to use designated cool zones, fundamentally altering work culture to normalise rest breaks rather than stigmatise them. Lotte E&C deploys Internet of Things technology across roughly 80 sites, monitoring perceived temperatures every five minutes and assigning heat risk into five classifications, enabling real-time response protocols. Daewoo E&C has eliminated the threat of penalty for workers reporting physical distress, removing a critical psychological barrier that might otherwise keep exhausted or heat-stressed workers on the job. These approaches suggest companies are investing not just in equipment but in systematic behavioural change.
Multinational construction firms are also responding to the specific vulnerabilities of their most precarious workers. Hyundai E&C has distributed emergency reporting guides in 22 languages and supplied cooling vests with integrated fans and electrolyte solutions, acknowledging that migrant workers may face language barriers and distinct physiological risks. Kumho E&C has partnered with beverage manufacturer Lotte Chilsung to supply bottled water, sports drinks, cooling towels and portable shelters throughout the construction season, transforming corporate supply chains into heat-mitigation infrastructure. These measures recognise that migrants often lack the social networks and workplace familiarity that might otherwise help them navigate extreme conditions.
Heavy industrial operations, which cannot simply halt production during heatwaves, are implementing rigorous work-rest cycles calibrated to precise temperature thresholds. Posco, operating blast furnaces continuously, mandates 15 minutes of rest after each 45-minute work interval when perceived temperatures exceed 35 degrees Celsius, and 10 minutes after every 50 minutes when temperatures exceed 31 degrees. Hyundai Steel enforces similar protocols, with at least 10-minute breaks per hour above 31 degrees and 15-minute breaks above 35 degrees. These schedules represent a fundamental restructuring of production rhythms, trading continuous output for worker survival. Shipbuilders have extended the logic further: Hanwha Ocean doubled morning and afternoon breaks from ten to twenty minutes through August, lengthened lunch by thirty minutes above 28 degrees and one hour above 31.5 degrees. HD Hyundai Heavy Industries extended lunch from one hour to ninety minutes and operates over 270 cooling facilities across shipyards, coupled with cooling vests, ice water and electrolyte supplements. Samsung Heavy Industries created dedicated task forces for heat coordination, while SK hynix and Coupang have expanded climate-control systems across their operations.
However, these protective innovations concentrate exclusively among large corporations. Of the 195 recorded heat incidents since 2022, over half occurred at workplaces employing fewer than 50 people, with forty-two at businesses with fewer than five workers. Smaller employers typically lack the capital to install cooling systems, the regulatory infrastructure to monitor worker wellbeing, and the scheduling flexibility to restructure operations. Labour specialists and lawmakers emphasise that these workers often lack access to occupational health personnel, cooling equipment and adequate rest facilities, leaving them fundamentally exposed during extreme weather events.
Migrant workers in agriculture represent the most vulnerable cohort. In recent weeks, a Thai seasonal worker died while labouring in fields in Haenam, South Jeolla Province, and a Vietnamese national perished working outdoors in Goesan, North Chungcheong Province. These deaths underscore how protective measures adopted by urban manufacturers and construction firms have not extended to rural and agricultural sectors, where migrants comprise a substantial portion of the workforce and communication barriers, undocumented status, and economic desperation create conditions where workers push beyond safe limits.
Parliamentarian Kim Wi-sang, who compiled the compensation service data, has called on government to move beyond focusing on large workplaces and substantially strengthen inspections and practical protections specifically targeting seasonal migrant workers and employees at small outdoor worksites. His intervention suggests the government has not yet matched corporate innovation with regulatory pressure on smaller employers or targeted support for the most vulnerable workers. This represents a critical policy gap as climate extremes intensify across East Asia, particularly affecting migrant populations who sustain agriculture, small manufacturing and service sectors.
The South Korean experience offers instructive lessons for Malaysia and other Southeast Asian economies. Heat-related workplace incidents will only increase as climate change accelerates, yet protective measures currently concentrate among multinational corporations while smaller businesses—which employ vast numbers of workers including migrants—remain unprotected. South Korea's legal accountability framework, while imperfect, has at least created incentives for large employers to invest in worker safety. Malaysia, with far larger migrant workforces and less stringent accountability mechanisms, may face more severe consequences if comparable legal and regulatory pressure does not emerge.
The broader implication is that extreme heat is becoming not merely an occupational health issue but a structural inequity problem. Well-resourced companies can manage climate risks; smaller employers and migrant workers cannot. Without targeted government intervention—mandatory cooling facilities, mandatory rest protocols, mandatory worker education in multiple languages, and genuine enforcement—heat-related deaths will concentrate among society's most economically vulnerable members. South Korea's ongoing heatwave will likely produce more fatalities in coming weeks, but perhaps also more forceful policy demands that heat protection becomes a basic right rather than a corporate luxury available only to workers at large firms.
