Feels like something similar to the NFPA 704 safety square [0] — maybe they could copy that to mimic a relatively accepted "danger measurement" format.

Also of interest: hypercanes [1], my hurricane-adjacent Interesting Wikipedia Deep Dive, which (according to Wikipedia):

- require ocean temperatures of 120 °F (50 °C)

- have sustained winds of 500 mph (800 km/h)

- have barometric pressures in their centers sufficiently low enough to cause altitude sickness

- may persist for several weeks due to above low pressure

- may be as large as North America or as small as 15 mi (25 km) — Wikipedia has an unhelpful caption about the size of the "average hypercane" (!)

- extend into the upper stratosphere, unlike today's hurricanes (lower stratosphere)

- due to above height, may sufficiently degrade the ozone layer with water vapor to the point of causing (an additional) hazard to planetary life

[0] https://en.wikipedia.org/wiki/NFPA_704

[1] https://en.wikipedia.org/wiki/Hypercane

Interesting thought experiment but if any significant area of the ocean was even 100F, much less 120F, I think we’d be cooked.