Tokyo Metropolitan Police officers are using heat-stroke countermeasures to manage security at the Sumida River Fireworks Festival this Saturday [1].
The measures come as extreme summer heat poses a significant health risk to both the massive crowds and the security personnel tasked with maintaining order. With nearly one million people converging on a concentrated area along the river, the potential for heat-related medical emergencies is high.
Authorities expect approximately 930,000 spectators [1] to gather along the borders of Sumida-ku and Taito-ku for the event. To combat the conditions, officers are equipped with sunglasses, portable fans, and specialized bottle-holder accessories to ensure constant hydration [1, 2]. These precautions are necessary because the maximum temperature in central Tokyo is forecast to reach 36°C [1].
The festival is scheduled to launch approximately 20,000 fireworks [1] starting at 7 p.m. [1]. While the display occurs in the evening, the buildup of crowds during the hottest part of the day creates a dangerous environment.
Attendees are also taking their own precautions. One visitor from Kumamoto said the weather was humid and hotter than their home region [1]. The visitor said they are carrying individual bottles of water, though they noted that the water becomes lukewarm within about 15 minutes [1]. Despite the heat, the visitor said they are looking forward to the fireworks [1].
This year's attendance remains consistent with typical annual figures, which often reach close to 1,000,000 people [1]. The Tokyo Metropolitan Police are prioritizing visibility and accessibility to water to prevent collapses or heat exhaustion among the public and staff [2].
“Officers are equipped with sunglasses, portable fans, and specialized bottle-holder accessories.”
The adoption of specialized cooling gear by the Tokyo Metropolitan Police reflects a growing institutional necessity to adapt to rising summer temperatures in Japan. As urban heat islands intensify, the safety of large-scale public gatherings now depends as much on thermal management as it does on traditional crowd control, signaling a shift in how city officials plan major cultural events during the July-August peak.
