Too Much of a 'Good' Thing?

There has been a lot of excitement about the hottest UK summer since 1976 but people are starting to be concerned about the effects on agriculture across Europe (https://www.theguardian.com/environment/2018/jul/20/crop-failure-and-bankruptcy-threaten-farmers-as-drought-grips-europe). This is not only threatening the livelihoods of farmers but also the availability and cost of food. Given other reports about the complete impending loss of mountain glaciers in Canada, multiple deaths by heatstroke in Japan and fires in the USA, it is a bit difficult not to be concerned. It has been suggested that many of these wide-spread conditions are due to a persistent migration of the jet stream. This can be taken to imply that it is too early to relate these 'extreme weather events' to climate change but a change in the location of the jet stream is a climate change event. I do think that there is a general lack of urgency in many policy-making circles.