Tokyo zoo loses 3 lions to suspected heatstroke amid record heatwave

Japan's brutal summer has claimed the lives of three lionesses at Tama Zoological Park in Tokyo. The zoo suspended its lion exhibit on July 23 after 10 of its 16 big cats began showing signs of heat stress, including loss of appetite and decreased activity. The three lionesses died separately: one last Tuesday, another on Friday, and a third on Sunday, according to a zoo spokeswoman speaking to Agence France-Presse. The zoo's veterinarian attributed the deaths to suspected heatstroke, citing dehydration and multiple organ failure observed in the animals. The remaining sick lions are still receiving care.

Officials noted that the intense heat arrived unexpectedly early after the rainy season ended in late July. Zookeepers have ramped up countermeasures in recent years, recognizing that Japan's humid heat poses unique challenges even for lion species typically resistant to high temperatures. Unlike the dry air of African savannas, Japan's summer heat carries high humidity, making it harder for lions to cool through panting and evaporation. The incident highlights the growing threat of climate-fuelled extreme weather on animal welfare, prompting zoos to reassess habitat cooling systems, shade availability, and water access. As the heatwave continues, the park is prioritizing the health of its remaining big cats while the exhibit remains closed to the public.