More than 3 billion people could end up living in extreme heat in the not so distant future.
A new study showed that the unbearable heat could encompass regions of the world in the next 50 years.
The actual number of people affected by the climate change depends on how fast the global population grows.
The other key factor in how fast the staggering temperatures engulf the globe is related to levels of carbon emissions.
20 million people worldwide currently live in regions with extreme high temperatures.
Researchers found that parts of Africa, Asia, South America, and Australia are likely to see an increase in the next 50 years.
