It might be too late to pull back the climate changes in Penang, both the Island and mainland. In just 30 years, the temperature increase 6+°C, the next 20 decades will be harsh as the changes compound itself. There is a study from Think City Institute [1]:

There was an increase of 5.63°C in Bayan Lepas' surface temperature between 1988 and 2020 and nearby George Town surface temperature between 1988 and 2020 showed an increase of 6.37°C. [1]

Currently, for shinny days, it is averaging 32-34°C, the next decades, I afraid some will have to withstand the 40°C as the new norm, and imagine with the humidity.

[1] https://thinkcityinstitute.org/Urban-Solutions-for-Malaysian-Cities/index.html#page=182