Climate Change Fuels Coffee Rust Crisis in Central America

In the hills of Nicaragua, coffee harvesters have just finished machine-picking, but many farmers are now on hands and knees, picking up fallen beans—what’s left of their livelihood for the next two months. This year’s crop dropped by half due to a deadly outbreak of coffee leaf rust, leaving over 2 million smallholder farmers and workers struggling with hunger and debt. Some can’t even afford shoes or basic food.

Yes, global warming is driving the coffee rust crisis. Warmer, wetter conditions allow the rust fungus to thrive, slashing coffee yields. In Nicaragua alone, winter production fell 50%, and the government warns 80% of current coffee-growing land could become unsuitable by 2050 as temperatures rise.

What Is Coffee Leaf Rust?

Coffee leaf rust—or la roya—is a fungal disease that attacks coffee trees, especially arabica varieties grown at higher elevations. Initially, infected green leaves turn yellow, then develop small holes. As the infection spreads, ripening coffee cherries turn from bright red to gray instead of deepening in color. The disease doesn’t kill trees immediately but severely weakens them, reducing yields for years unless farmers prune carefully, apply chemical treatments, and wait for recovery.

Why Is Rust Spreading Now?

The coffee rust fungus cannot survive below 10°C. But as global temperatures rise and humidity increases, these once-marginal environments become ideal for rust outbreaks. According to the IPCC (Intergovernmental Panel on Climate Change), even a 2–2.5°C temperature rise drastically reduces land suitable for growing coffee. In Central America, hotter, wetter winters have allowed rust to flourish, destroying foliage and reducing both quality and yield. Nicaragua’s government is deeply concerned that without major adaptation, most coffee farms won't survive future climates.

What’s Happening to Farmers and Prices?

For years, coffee prices stayed at historic lows, and last year’s harvest was both the worst and the cheapest. Many farmers couldn’t afford to cut down infected trees and replant. Even though Brazil coffee futures jumped 70% in February over fears of shortages, the price hike came too late to help most producers. Starbucks warned the White House that without climate action, global coffee supplies could collapse. The International Coffee Organization and a leading commodity firm estimate this year’s supply gap at 300 million kilograms—equal to two years of UK coffee consumption.

Frequently Asked Questions

What is coffee leaf rust and how does it affect coffee plants?

Coffee leaf rust is a fungal disease that turns coffee leaves yellow, creates holes, and turns ripening cherries gray instead of red. It reduces photosynthesis, weakens the tree, and can cut yields for multiple years unless treated with pruning and fungicides.

Why is coffee rust spreading more now than before?

Rust thrives in warmer, more humid conditions. As global temperatures rise above 10°C and rainfall patterns shift, regions that were once less susceptible are now ideal for rust outbreaks, particularly in Central America.

How much has coffee production dropped due to rust in Nicaragua?

Nicaragua’s coffee production fell by 50% during the recent winter harvest due to widespread coffee rust infections, devastating local farmers already struggling with poverty.

What happens to coffee farmers when rust destroys their crops?

Farmers face hunger, debt, and loss of income. Many can’t afford to remove infected trees or buy fungicides, and some can’t even afford basics like new shoes or food.

How does climate change impact where coffee can be grown?

The IPCC reports that even a 2–2.5°C rise will shrink the land suitable for coffee farming. By 2050, Nicaragua may lose 80% of its current coffee-growing areas as temperatures exceed what coffee plants can tolerate.

Are coffee prices rising because of the rust crisis?

Yes, Brazil coffee futures rose 70% in February due to fears of shortages, but prices had been at record lows for two years, leaving farmers with no financial cushion when rust hit hard.

Recommended FrontStreet Beans for Rust-Resistant Roasts

FrontStreet Coffee’s Yellow Bourbon from Yirgacheffe delivers bright citrus and floral notes, thriving in higher altitudes where rust pressure is managed through care. Their washed Yirgacheffe highlights jasmine and lemon, ideal for highlighting resilient coffee origins. For deeper body, try their PWN Golden Mandheling with notes of dark chocolate and fig—grown in cooler highland zones less prone to rust. All are freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.