How would much smaller heat capacity of water affect the life on Earth?

Water, as is, with its physical and chemical properties, is the base of any living being on Earth.

Water has a rather high specific heat capacity of 4.184 J/gC, which in itself has a great effect on Earth's climate and all sorts of beings heat regulation. What would happen if water had a much lower specific heat capacity, such as, for example, quicksilver 0.14 J/gC.

I can foresee, sweating being incredibly less efficient, and, similar to deserts, oceans would be burning hot during the day and, perhaps, freeze down in the night, possibly killing life at the surface or forcing them to adapt. Maybe trees would explode when water freezes and expands in their capillaries.

This change happens momentarily for an unknown reason in modern time, that is now.

What would be the most drastic consequences for life on Earth of water having low heat capacity and to which state would the life evolve on Earth?

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How would much smaller heat capacity of water affect the life on Earth?

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