Climate change reaches your beer through two crops, and what it changes is the quality and the price of them long before it changes whether they exist. A hotter, drier summer pushes a hop cone through its development quickly, so it comes off the trellis lighter and carrying less alpha acid and a shifted oil profile, while drought and heat arriving together cut the barley yields that a malt supply depends on. The published research on both sides describes a market that reprices and reformulates before it runs short, which is why the first thing most drinkers notice is a softer, less aromatic pint and a higher price rather than an empty shelf.
The study most often quoted when somebody says climate change will take your beer away is a modelling paper published in Nature Plants in October 2018, and it found that under the most severe modelled combination of extreme drought and heat, global beer consumption would fall by about 16 percent, roughly 29 billion litres, a volume comparable to what the United States drinks in a year. That is a real finding and a serious one, and it is also narrower than the way it usually gets repeated, because the paper describes a projected drop in how much people drink under future climate stress rather than a collapse in brewing that has already happened.
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What Climate Change Does To Beer
- Read the famous 16 percent figure as a drop in consumption under a severe modelled drought, not as a collapse in brewing production.
- Note that Europe's hop records show cone development starting earlier and alpha acid content falling, so the decline is documented rather than projected.
- Watch price and availability rather than empty shelves, because a hop shortage shows up as a swapped variety or a lost allocation long before a beer disappears.
- Know that BC's hop link is small, that the barley link is prairie grain, and that breeding for a hotter season takes years to reach a commercial planting.
The Study, Stated Correctly
The paper is titled Decreases in global beer supply due to extreme drought and heat, it came from Wei Xie, Dabo Guan and colleagues, and the Nature Plants paper models what happens when drought and heat cut the yields of the things beer depends on, barley above all, plus hops, rice where it is used as an adjunct, and the water a brewery needs. The headline numbers came from the most severe scenario, and the coverage at the time translated the shortfall into some 51 billion pints worldwide, with the United Kingdom looking at roughly 2.3 billion fewer pints a year.
Three parts of that finding are worth getting straight, because the garbled version circulates widely. The 16 percent figure describes consumption rather than production, so it measures how much less people would drink in a severe year and not a number of breweries closing. The pint total that usually travels with it, three billion glasses, corresponds to nothing in the paper. And the study is from 2018, which means any article introducing it as news from recent years is running a headline that is now eight years old.
Why Hops Are Climate-Sensitive
Hops are a perennial climbing plant that wants a temperate year: cold dormancy in winter, long summer days to trigger cone development, and a frost-free growing season long enough for bines to run up a trellis more than five metres tall. That set of requirements is why commercial growing is concentrated in a handful of valleys rather than spread evenly across the planet.
Heat and water stress show up in the cone, which matters because brewers are buying two things from it. Alpha acids supply bitterness, and the essential oils supply aroma, and both are laid down during cone development, so a hot, dry stretch in midsummer can cut the weight of the crop and change the chemistry inside it at the same time. Too much rain and humidity is the other direction of the same problem, since wet cones are the condition under which mildew and botrytis spread through a yard, and a harvest week of rain can cost a grower the crop's quality rather than its tonnage.
What the European Record Measured
None of the above is hypothetical, because a 2023 study in Nature Communications led by Martin Možný of the Czech Academy of Sciences went and looked. Pairing weather records with crop models for the hop regions of Germany, the Czech Republic and Slovenia, the authors compared 1971 to 1994 against 1995 to 2018 and found that cone development had started roughly 20 days earlier, that yield per hectare had slipped, and that alpha acid content, the figure brewers buy a crop by, had fallen by around 0.6 percent. Their projections for 2050 put a further decline of 4 to 18 percent on yield and 20 to 31 percent on alpha content.
Two details in that record matter more than the headline percentages. The first is that the loss of bitterness and the loss of weight share a cause, since a cone lays down alpha acids across the length of its summer and a season that runs hot pushes the plant through its calendar before the chemistry is finished. The second is that water rather than heat alone drives the yield side, with cone weight tracking rainfall through the growing season and falling sharply when precipitation drops well below normal. That is why the southern end of Europe's hop belt took the steepest modelled losses while the northern yards came out comparatively stable, and it is the finding that points to a shift in which regions hold the advantage rather than to an end to growing hops anywhere.
Where the World's Hops Are Grown
Germany's Hallertau in Bavaria is the largest contiguous hop region on the continent, with the Czech Žatec area, Poland's Lublin region and Slovenia's Savinja valley the other European names that matter. Across the Pacific, the Yakima Valley in central Washington, the Willamette Valley in Oregon and Canyon County, Idaho, supply most of the hop crop that North American breweries buy, and New Zealand grows its share in the Nelson and Tasman districts at the top of the South Island.
That concentration is the actual exposure, more than any single projected number. When most of the world's aroma hops come from a few irrigated valleys that share a climate type, a bad season in the same weather pattern hits several suppliers at once, and a buyer in Vancouver or Victoria feels it as availability and price rather than as a headline in a journal.
What That Means for British Columbia
Hops are grown in the Fraser Valley and in a few other interior valleys here, on acreage small enough that a bad summer in this province does not move a global price. Members of the BC Hop Growers Association described the sector in 2023 as roughly five commercial-grade farms working no more than 50 acres, which is a rounding error beside the 33,361 acres Washington harvested in 2024, and that gap is why most BC breweries buy from the Pacific Northwest or Germany. The malt is the bigger local link, and Canadian malting barley is overwhelmingly prairie grain, mostly from Alberta and Saskatchewan, so the barley side of the 2018 study is closer to home than the hop side.
The constraint BC growers name is also close to the opposite of the drought in the European literature. The coast is damp rather than dry, and mildew pressure is the reason given for wanting hops bred for local conditions rather than genetics adapted to an irrigated interior, with water availability a relative advantage over the Yakima Valley. That is the context for the breeding work at Kwantlen Polytechnic University, where the NextGen Hops program led by Mathias Schuetz has been crossing hops since 2019, drawing on feral North American plants in search of disease resistance and yield, with the molecular analysis funded by Genome BC. That is what a claim about breeding for a changing climate has to look like before it is worth printing: a program, a person, a year.
British Columbia also knows what an extreme heat event looks like. In June 2021 the Lytton area in the Fraser Canyon reached 49.6 degrees Celsius, the highest temperature ever recorded in Canada, and much of the town burned shortly afterwards. That is not a hop story on its own, and no verified figure says how much this province's hop and barley acreage lost in that week, but it is the kind of summer that makes irrigation, canopy management and water use the practical conversation rather than a theoretical one.
Adaptation, And What Is Actually Being Bred
Public hop breeding is real and long-running, at Germany's Hop Research Centre at Hüll, in university programs across the United States, and at Kwantlen Polytechnic University in Surrey, and the varieties it releases are selected for disease resistance and cone quality. What has to go is the vague version of the claim, in which heat-tolerant and drought-resistant hops are simply being developed somewhere, with no program, no grower and no variety attached to them. Breeding for a hotter, drier season is a genuine objective in programs that will name themselves, and a hop cross still takes years to become a commercial planting, so a variety bred for a hotter world is still some years from a brewery's store.
- Irrigation is the first line of defence in every major hop region, since the valleys that grow hops are dry by nature and the crop is water-hungry, which is why drip and soil-moisture management matter more than any new cultivar.
- Canopy and trellis work changes what the cones experience, because airflow reduces disease pressure and shading reduces heat load, and both are decisions a grower makes in a season rather than in a breeding station.
- Planting material and varietal mix spread risk, since a yard of one cultivar is a yard that fails on one schedule.
- On the brewing side, water use per litre produced is the number breweries actually measure, and it is the one place a BC brewery can cut its own exposure without waiting on a farm.
Frequently Asked Questions
Was the 16 percent figure about beer production or beer consumption?
It is a figure about consumption, not production. The paper models supply losses from reduced barley, hop, rice and water availability, and then reports the result as a decline in how much beer people drink, along with an increase in price. Quoting it as a 16 percent fall in production is the same number attached to the wrong thing, which is how the statistic usually travels.
Are hop yields already falling in a way I can verify?
In Europe, yes, which makes it the strongest measured evidence available on this question. The 2023 Nature Communications work compared three decades of recorded yield and alpha data against the two decades before them and found both lower, so a decline in central European hop gardens is documented rather than projected. For North America nothing in the published research shows a climate-driven yield collapse, and no honest figure exists for a current regional decline there, because the number usually quoted is a projection about future consumption rather than a measurement of a field.
Which beer styles are most exposed to a bad hop harvest?
The heavily hopped ones, because an IPA uses several times the hop weight of a lager and the aroma varieties are the scarcest part of the market. A dry, hoppy pale lager sits in the awkward middle, using a modest amount of the same aroma hops that drive prices when a harvest is short, while a stout brewed largely from roasted malt and barley is more exposed to grain prices than to anything happening in a hop yard.
Will climate change make beer harder to find in BC?
Scarcity is the wrong thing to watch for, and price is the right one. A hop shortage shows up as a brewery swapping one variety for another on a recipe, or a smaller label losing its allocation to a larger buyer, which means the beer you want may taste slightly different or cost more long before it disappears from a shelf.
What can a drinker in British Columbia actually do about it?
Buy the beers whose brewery talks about grain and water, since a taproom that names its malt supplier and measures its water ratio is the one investing in the part of the problem that is real here. Drinking seasonally and locally also shortens the chain, and asking what hops are in the glass is the cheapest way to keep a conversation going with the person who has to buy them.
Read the Paper Before You Repeat the Number
The 2018 study is worth reading precisely because it is more careful than the coverage of it, and the useful takeaway for a BC drinker is not that beer is running out but that a drink built on three crops and a lot of water is exposed to weather, in the Hallertau and the Yakima Valley and in the Fraser Valley. Next time a post tells you a study predicts the end of beer, check whether the number is about consumption or production, and what year the study was published.
