Effects of Temperature on Mortality in Nairobi, Kenya
Egondi, T., Kyobutungi, C., Kovats, S., Muindi, K., Ettarh, R. and Rocklov, J. 2012. Time-series analysis of weather and mortality patterns in Nairobi's informal settlements. Global Health Action 5: 23-31.
"Overall," in the words of the six scientists, "there are seasonal fluctuations in mortality, with the highest rates of death occurring during periods of relative cold." And they say that "mortality risk over the year rises from the lowest mortality risk by about 40% in the 0-4 age group and by about 20% for all ages" in response to a drop in temperature. What is more, they note that "the effects of low temperatures on mortality can last for days." And they add that "although the world will get warmer in the future, the low temperature-related mortality is likely to remain an important concern."
Even in places that are appreciated for their relative warmth, a change in the weather or shifting of the seasons to cooler conditions, rather than an equivalent increase in warmth, is typically the more deadly of the two types of temperature evolution.