That significant amount of people died due to only 0.5 degrees of Celcius change (albeit, it's hard to distinguish deaths related to temperature drop itself rather than gases from volcanos and other reasons and whether smaller human population is the cause or the consequence). In Paris it was agreed to keep the temperature from changing no more than four times that.
People will die. They already do.
Source I can look up now https://www.huffingtonpost.com/entry/climate-change-lancet-public-healthus_59f7676fe4b09b5c2567dd2f
My main point is that we/our children will heavily feel those 2 extra degrees Celsium agreed on in Paris. But thanks for pointing out that my sources on this are skimpy.
Some food for thoughts about climate.
1. What is the Little Ice Age (Wikipedia knows)?
2. What were the consequences for the humankind?
3. How much did the temperature drop?
4. How much can the Earth warm up according to the Paris Agreement? :)