Mary Leonard’s busy season that started pre-Halloween wraps up post-Valentine’s Day on Monday. But the chocolatier and owner of Chocolat Céleste in St. Paul said it’s already felt like an “off” season.

Rising cocoa prices, driven by climate change, are reshaping Valentine’s Day chocolates. Extreme heat and erratic rainfall in West Africa are reducing cocoa yields, leading to higher costs and recipe changes.

Another cocoa harvest in West Africa has come up short, leading to the worst deficit in decades. That means higher prices for chocolate makers and for shoppers.