Supermarket shoppers have been greeted with empty shelves and broken fridges this week - and experts warn the situation is only going to get worse. The June heatwave has seen temperatures reach highs of 36.9C, with health alerts issues across large parts of England, thousands of school closures and trains coming to a halt. Away from the discomfort and inconvenience the heat brings, experts warn the impact of rising temperatures could soon be felt in our wallets. From hiked supermarket food