Could heatwaves make your food shop more expensive?

Could rising temperatures lead to higher grocery bills?

While sun-seekers may be enjoying this summer's hot and dry conditions, farmers are facing significant challenges. This raises the question of whether these weather patterns could impact the cost of food for consumers.

As heatwaves continue across the UK, a chilled supermarket aisle offers a welcome respite. Refrigeration units are working overtime to keep products cool, shutters are drawn to block out warm air, and some items are temporarily removed from shelves on the hottest days. Last week, the Environment Agency declared that over half of England is now experiencing drought conditions.

However, as temperatures climb, it's not just the chillers that retailers might be adjusting. Extreme weather creates a ripple effect throughout the entire supply chain, and the British Retail Consortium warns that this could drive up prices.

A supply chain encompasses several stages, from a product's creation to its arrival in stores for purchase. Consider a loaf of bread: the grain is first grown, harvested, milled, and stored before being transported to a factory. These ingredients are then used to bake and package the bread, which moves to warehouses before ultimately reaching supermarket shelves. Each step in this process incurs costs, such as transport and storage, and any increase in these expenses could result in a more expensive final product.

Last week, farmers and flour producers reported adapting to the challenges of the earliest harvest in 50 years. The National Farmers' Union has also cautioned that a continued drought could lead to shortages of certain food products.

Professor Manoj Dora, director of the Centre for Intelligent Supply Chains at Anglia Ruskin University, notes that "one week of hot weather will not make a loaf of bread more expensive." However, he suggests that prices could increase if crop supplies dwindle, primarily due to the impact on the initial stages of the supply chain. He predicts that "meat, milk, eggs, and chicken will be impacted by [a lack of] animal feed," adding that "across different food products, prices could surge if we do not manage these things immediately."

Dora describes the UK's supply chain as "resilient," meaning the heatwave's effects may not be felt right away. He emphasizes the need for long-term planning, stating, "We need to start thinking of the long term by reconfiguring our supply chain in terms of locations and transportation, and by supporting the farmers."

Simon Willis, chief executive of Camgrain, a Cambridge-based grain storage co-operative, explains that drought conditions have prevented this year's crops from reaching their full potential. He notes that harvest, typically beginning in early August, has already concluded after a very dry spring. "This year's very dry harvest will mean that the quality will be good but the yield will be down," he told BBC Radio Cambridgeshire.

David Wheatley, an arable farmer from Wisbech St Mary, Cambridgeshire, believes farmers are likely to be more affected by heatwaves than consumers. He points out that "a lot of contracts with supermarkets are already agreed a year in advance, so [farmers] are not going to get paid any more money even though their yields are down this year." He doesn't anticipate a significant impact on supermarket prices, suggesting that "they can just bring more food in from other countries."

However, Professor Dora warns that imported goods could also be affected, particularly wine from countries like France, which has also experienced severe high temperatures. He explains that "wine has not just a quantity problem, but also a quality problem."

Andrew Opie, director of food and sustainability policy at the British Retail Consortium, states that climate change presents challenges for both retailers and their suppliers. He notes that "extreme weather, including drought, can affect crop yields and place upward pressure on prices." Opie adds that "retailers are experienced in managing supply disruptions and will take all necessary steps, including sourcing from alternative suppliers where appropriate, to minimise any impact on customers."