Greggs issued a profit warning after ‘very high temperatures’ reduced footfall even as demand for cold drinks increased. Chief executive Roisin Currie said the business had “learned some lessons” after last summer, noting that demand typically softens once temperatures exceed 30°C. Across Europe and North America, retailers are redesigning ranges around the expectation that prolonged summer heat is becoming the norm rather than the exception. UK research from IGD ShopperVista illustrates how dramatically shopping habits can change during periods of extreme heat. A global patternExtreme heat is reshaping consumer behaviour and food retail strategies in markets around the world.