Just in case you wondered what it was:
Weather context:
“Mercury” refers to the mercury thermometer, where mercury rises as temperature increases.
So, a “mercury climb” means a rise in temperature — basically, it’s getting hotter.
Example: “The mercury climbed to 95°F today” = it reached 95°F.
Metaphorical use:
It can be used figuratively to describe an increase in intensity, emotion, or pressure, like “tensions climbed” or “tempers rose.”
Music or pop culture context (less common):
Sometimes artists or lyricists use “mercury climb” poetically to suggest rising energy, volatility, or heat — since mercury reacts to heat and pressure.
