The balls are hot. This is an active condition, not a classification.
SOLUTION
熱金玉 — Netsu-Kintama, literally Hot Golden Balls — is the MTREES active thermal threshold intangible, triggering at 100°F baseline operational heat and escalating to severe classification at 105°F+, at which point the Japan Meteorological Agency would issue a kokushobi (酷暑日) advisory, which translates to 'cruelly hot day,' which the JMA introduced specifically so the news media could sound a panic alarm with linguistic authority. The distinction between 熱玉 (Netsu-Tama — Hot Balls as a static label) and 玉熱 (Tama-Netsu — Balls are Hot as a dynamic condition) is grammatically and operationally significant: the former is a classification applied after the fact by a committee; the latter is a real-time trigger condition that the system detects, names, and acts upon before the committee convenes. Netsu-Kintama is the latter. The character 熱 (Netsu) sits above 金玉 (Kintama) in the node visual, heat acting upon the spheres from above, which is also how summer works. Thermal data is sourced from comp_temperature. The intangible does not measure. The intangible declares. The measurement already happened. The declaration is the problem.