Weather change.

Weather change

I think in hot weather people can't have enough water to survive and the glaciars  in the Highlands will melt and there won´t be enough water for all the population if they are thirsty or lack of water.

But, on the other hand if the weather is cold , they are exposed to have a cough or fever or lung problems, which are the most common diseases. So, the best recommendation is to wear warm clothes.