Fluctuations in demand due to high temperatures put stress on power systems. They raise the threat of electricity shortages, restrictions, blackouts and brownouts.

Often, grid operators need to bring older, inefficient and more polluting power plants online to cope with the spikes in demand.

Consumers also deserve better information. In Thailand, for example, households with a budget of USD 350 can purchase a low-efficiency unit or one that is 50% more efficient for the same price.

Buying the more efficient unit could result in savings of up to USD 2 000 over its lifetime and cut electricity bills almost in half.

The good news is there are straightforward fixes.

Setting mandatory minimum energy performance standards (MEPS) for cooling devices and improving labelling has proven incredibly effective.

Policies like this could double the average efficiency of air conditioners sold.