Climate Change Fuels Malaria Surge in Southern Africa, Threatening Elimination Goals

Malaria Cases Spike as Climate Conditions Shift

In a remote South African village, Paulina Mhlongo sits in her yard as health workers in green protective gear move briskly through her home, soaking the walls with anti-mosquito insecticide. Her teenage grandson fell critically ill last year from malaria, the disease that kills more than a quarter of a million people annually and is surging in Southern Africa as the climate shifts.

Before this spraying, the family's "only defense" against malaria-carrying mosquitoes was a rattling fan, said Mhlongo, a 63-year-old retiree. Her village of Calcutta is in Mpumalanga, one of three provinces in South Africa's malaria belt experiencing changing rain patterns and rising temperatures that favor mosquito breeding. Heavy rains leave pools for eggs, while warmer temperatures speed up mosquito development and shorten the malaria parasite's incubation period.

Malaria cases in Mpumalanga jumped fourfold in January compared with a year earlier, according to the National Institute for Communicable Diseases (NICD). The upsurge jeopardizes South Africa's goal of eliminating the disease by 2029.

Gauteng Province Reports Alarming Figures

Gauteng—the powerhouse province home to Johannesburg and Pretoria, and where malaria is not endemic—logged more than 400 cases and 11 deaths in the first three months of 2026, according to the NICD. While most infections were imported into the province from known hotspots, these figures are "concerning" even if the disease is not being transmitted between people, the public health body said.

The increase in malaria cases does not mean the disease is migrating, but it highlights the growing challenge of containing outbreaks in a warming world. Health officials are particularly worried about the strain on resources and the potential for localized transmission if conditions become more favorable.

Regional Outbreaks Worsen

Human-driven climate change has increased the likelihood and intensity of extreme weather, while the naturally occurring La Niña weather phenomenon brought above-average rains to parts of Southern Africa in early 2026, causing flooding that created more mosquito breeding sites, the group said. Namibia reported 8,760 cases in the first four weeks of 2026, a 68% increase from a year earlier. Flood-hit Mozambique recorded more than 1.35 million cases in the first six weeks of the year, up 55%, alongside dozens of deaths.

The outlook offers little reassurance as climate volatility deepens. Health systems across the region are struggling to keep up with the surge, and experts warn that without aggressive intervention, the disease could become entrenched in new areas.

Elimination Goals at Risk

South Africa's ambitious goal of eliminating malaria by 2029 now appears increasingly difficult. The fourfold increase in Mpumalanga and the concerning figures from Gauteng underscore the need for enhanced surveillance, vector control, and public health campaigns. Climate adaptation strategies must be integrated into malaria control programs to address the shifting patterns of transmission.

As Paulina Mhlongo and her family know all too well, the battle against malaria is far from over. With climate change supercharging mosquito breeding and parasite development, the window for elimination is narrowing. The coming years will test the resilience of health systems and the effectiveness of current interventions.

This article is based on reporting by Medical Xpress. Read the original article.