noun, noun which may take the genitive case particle 'no'
scorching heat; blazing sun
Describes intense, oppressive sunshine, often in summer. Frequently used with の to modify nouns (e.g., カンカン照りの日).
今日はカンカン照りで、外に出るのがつらい。
It's scorching hot today, and going outside is tough.
カンカン照りの下で運動会が行
The sports day was held under the blazing sun.
猛暑 refers to intense heat as a weather condition, whereas カンカン照り specifically emphasizes the strong, glaring sunlight.
The word is a compound of the mimetic adverb カンカン (representing intense sunlight or heat) and the noun 照り (sunshine, from the verb 照る). The exact origin of カンカン is uncertain, but it is a common sound-symbolic expression for strong, glaring light.