Japan's Kanto and Koshin regions are predicted to experience record-breaking temperatures of up to 40 degrees Celsius. To combat this impending heatwave, authorities have issued extreme weather warnings and encouraged residents to take necessary precautions like staying hydrated and avoiding outdoor activities during peak hours. This drastic rise in temperature poses a threat to people, particularly the elderly, and to the agricultural sector, which could suffer significant crop failure.

Water management and consumption are at the forefront of citizens' concerns during such heatwaves in Japan. With its aging population, the health and safety of the elderly who are more susceptible to heatstroke are also major concerns. Agriculture, a key part of the Japanese economy, faces threats from potential crop damage due to the heat.

In the context of the US or EU, similar measures are usually taken. Weather alerts are issued, citizens are advised to adopt safety measures, and contingency plans are put in place for vulnerable sectors like agriculture and for vulnerable groups like the elderly. However, the intensity of reactions may vary depending on the region's preparedness and acclimatization to such conditions.