This summer had record-breaking extreme heat.
On days of fierce heat, please drink water regularly.
Many people walked to the station in the intense heat.
The heat wave has been continuing this year.
Last month, the cities were hit by a record-breaking heat wave.
The company is taking measures to protect employees from the extreme heat.
Let's drink plenty of water to get through this extreme heat.
暑さ is the neutral word for heat or hot weather of any intensity, while 猛暑 specifically emphasizes extreme, fierce heat.
猛暑 is the broader meteorological term for an intense heat wave, while 炎天 specifically evokes the image of a blazing sun overhead and has a more literary feel.
猛暑 is used for fiercely hot summer weather, whereas 灼熱 covers any red-hot or scorching heat, literal or figurative.
冷夏 describes an unusually cool summer, the opposite of the extreme heat implied by 猛暑.
A Sino-Japanese compound written with 猛, associated with fierceness or intensity, and 暑, heat or hot weather.