The Portugal Judicial Police has opened an investigation into the deaths of two sisters, aged 73 and 76, who were found in cardiac arrest inside a horticultural greenhouse in Póvoa de Varzim on July 5, 2026. The victims, believed to have collapsed from extreme heat exposure while working, were declared dead at the scene despite emergency resuscitation efforts.
The Incident
Family members alerted emergency services after noticing the women's prolonged absence from their nearby residence. When paramedics and the Portugal National Republican Guard (GNR) arrived at the agricultural greenhouse in the coastal municipality north of Porto, both sisters were in cardiorespiratory arrest. Despite immediate intervention, medical teams pronounced them dead shortly thereafter.
Investigators transported the bodies to the Institute of Legal Medicine for autopsy, which will determine whether thermal exhaustion, cardiovascular events, or a combination of factors caused the deaths. The Judicial Police assumed jurisdiction as standard procedure in unexplained fatalities. Toxicology screens will also rule out pesticide exposure or carbon dioxide buildup, both potential hazards in enclosed growing spaces.
Heat as a Hidden Hazard
Greenhouses create microenvironments that trap solar radiation and humidity, forming conditions far more oppressive than ambient outdoor temperatures. During Portugal's summer, when daytime highs routinely reach 30°C or more along the northern coast, interior temperatures inside plastic or glass-covered agricultural structures can climb to 45°C or higher. For workers over 70, the physiological burden becomes acute: reduced cardiovascular efficiency, slower thermoregulation, and often pre-existing health conditions compound the risk.
The Portuguese Directorate-General for Health (DGS) advises that heat stress "reduces concentration, increases accident probability, and contributes to heat-related injuries and illnesses." Standard workplace guidance recommends rotating workers out of hot zones every 30 minutes, scheduling physically demanding tasks for early morning or evening hours, ensuring continuous access to drinking water, and creating shaded or climate-controlled rest areas.
What Happens Next
Forensic examiners will analyze whether the women suffered heat stroke, cardiac arrest triggered by environmental stress, or an unrelated medical event. The Judicial Police will also review whether the greenhouse met basic safety standards—ventilation openings, accessible exits, emergency communication devices—and whether occupational safety protocols were followed.
If investigators determine the deaths resulted from preventable workplace hazards, Portugal's Authority for Labour Conditions (ACT) could pursue administrative penalties. Such cases may also be referred to prosecutors for potential criminal charges under Article 152 of Portugal's Penal Code, which addresses negligent homicide in workplace contexts.
The inquiry should conclude within weeks, with autopsy results providing critical evidence. For now, the case underscores the vulnerability of elderly workers in agricultural settings and highlights the ongoing challenge of ensuring workplace safety compliance across Portugal's dispersed farming sector.
