Much of the discussion of the effects of climate change focuses on sea level rise. My opinion is that for most people, food and water shortages will have the most impact.

It is, perhaps, the end of the beginning.

Cereal Killer

‘Flash drought’ could devastate half the High Plains wheat harvest

An intense drought has quickly gripped much of the Dakotas and parts of Montana this summer, catching farmers and ranchers off-guard. The multi-agency U.S. Drought Monitor recently upgraded the drought to “exceptional,” its highest severity level, matching the intensity of the California drought at its peak.
The Associated Press says the dry conditions are “laying waste to crops and searing pasture and hay land” in America’s new wheat belt, with some longtime farmers and ranchers calling it the worst of their lifetimes.

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Rainfall across the affected region has been less than half of normal since late April, when this year’s growing season began. In parts of Montana’s Missouri River basin, which is the drought’s epicenter, rainfall has been less than a quarter of normal

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Recently, as the climate has warmed and crop suitability has shifted, the Dakotas and Montana have surpassed Kansas as the most important wheat-growing region in the country. The High Plains is now a supplier of staple grain for the entire world. According to recent field surveys, more than half of this year’s harvest may already be lost.

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this drought is an anomaly, a “flash drought.” It essentially came from nowhere. It didn’t exist just three months ago.
The frequency of these rapid-onset droughts is expected to increase as the planet warms.

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Droughts like these are closely linked to climate change.

Briefly...

A drought in the Dakotas spells trouble for the U.S. wheat harvest.

This year’s American wheat crop is currently rated the worst in 29 years. Wheat is humanity’s most important grain food source, and the U.S. is the world’s largest wheat exporter, with the Dakotas and Montana now its most important wheat-growing region. Wheat prices recently went up more than 10 percent in response to the worsening drought.
For decades, Kansas was America’s wheat state. That title recently shifted to North Dakota, as better growing conditions moved north due to warming temperatures. At this rate, Canadian farmers should be put on notice.

While I'm at it, let's document this as well.

Droughts Threaten Olive Crops in Southern Europe -- July 20, 2017

Hot and dry weather, heat waves and forest fires in several countries across Southern Europe have created drought conditions that are threatening crops like wheat, olives and almonds.
The region has been experiencing below average rainfall for most of 2017 which, coupled with high summer temperatures, has contributed to what the media are calling the worst drought in decades.
Cereal production in Italy and Spain is particularly affected and has fallen to the lowest level in 20 years. ... provinces in the Piemonte region are seeing a 30-percent decline in their wheat production ... In the regions of Castile and Leon where cereals represent the biggest crops, losses are estimated at around 60 to 70 percent. The grape and olive harvests are also under threat ...

Olive harvests have been poor for 3-4 years now.

On the other hand:
Strong Black Sea wheat exports seen as weather boosts crop -- Aug 4 2017

Black Sea wheat producers anticipate strong exports in the current marketing year as recent good weather has buoyed their expectations for bumper crops in Russia and Ukraine

This is the undeniable advantage of a global food distribution system. Drought in one region can be offset by surplus in another. But as global temperatures rise, we will see more droughts and fewer surpluses.