Be careful of heatstroke!
In Okinawa, the rainy season will soon be over. The rainy season will soon be over in Okinawa, and we will be in full-blown "summer.
In Japan, a daytime high temperature of over 25 degrees Celsius is called a "natsubi" (summer day), over 30 degrees Celsius a "manatsuhi" (hot summer day), and over 35 degrees Celsius a "moshoubi" (extremely hot day).
A night when the minimum daily temperature does not fall below 25 degrees Celsius is called a "sweltering night."
Thanks to the fact that Okinawa is surrounded by the sea in summer, we rarely have extremely hot days with high temperatures exceeding 35 degrees Celsius, but tropical nights with low temperatures exceeding 25 degrees Celsius will continue for some time to come.
However, tropical nights with minimum temperatures above 25 degrees Celsius will continue for some time to come. We will continue to have "hot days both in the morning and at night" with daytime maximum temperatures of 31 degrees Celsius and minimum temperatures of 28 degrees Celsius.
As a countermeasure against COVID-19 infection, I am sure that everyone wears a mask while working or going out, but it has been reported that wearing a mask makes you feel less thirsty.
Hydration (drinking water) is very important to prevent heatstroke, but wearing a mask makes it harder to feel thirsty even when sweating.
People who are working outside and those who are working or studying indoors should be proactive in hydrating themselves.
Every summer in Japan, people are rushed to the emergency room due to heatstroke. Some people even lose their lives due to heatstroke. Following last year, we need to take both measures to prevent COVID-19 infection and to prevent heatstroke this summer. If you feel uncomfortable, do not overexert yourself, and take water and rest.