A Saharan dust plume is expected to reach the Cayman Islands on Friday evening, prompting a public health advisory, as officials warn of potential impacts on air quality and respiratory health, particularly among vulnerable groups.

The Ministry of Health, Environment and Sustainability (MHES), in conjunction with the Public Health Department (PHD), has issued a precautionary advisory, with the Cayman Islands National Weather Service (CINWS) expected to formally issue a Dust Alert on Friday, July 10.

The incoming dust plume, originating from the Sahara Desert and travelling thousands of miles across the Atlantic, is anticipated to affect the islands from Friday evening through to Sunday. These seasonal events are not uncommon in the Caribbean, though officials note that their frequency and persistence may increase over the summer months.

Chief Medical Officer Dr Hilary Wolf cautioned that Saharan dust will likely remain a recurring feature in the weeks ahead. She emphasised the importance of vigilance among higher-risk groups, including individuals with asthma and other respiratory conditions, as well as children, older adults and those with underlying health issues.

“Saharan dust is expected to be a returning feature throughout this summer,” Dr Wolf said. “We continue to advise those most at risk to take appropriate precautions during Dust Alert periods. Anyone experiencing worsening respiratory symptoms should contact their healthcare provider.”

Health officials warn that elevated dust levels can reduce air quality and trigger a range of respiratory symptoms, including coughing, wheezing, sore throat and shortness of breath. While most individuals may experience only mild effects, the advisory stresses that vulnerable populations face an increased risk of more serious complications.

The presence of Saharan dust, combined with ongoing El Niño conditions, is also expected to suppress tropical storm activity across the Atlantic basin, contributing to a below-average hurricane season.

Authorities have issued targeted guidance to help mitigate health risks during the dust event.

For the general public, residents are advised to limit time outdoors, particularly during periods of high dust concentration, and to keep doors and windows closed to prevent dust from entering indoor spaces. The use of air conditioning on recirculation mode or air purifiers is recommended where available. Individuals should also take steps to minimise irritation by wearing protective clothing, avoiding contact with the eyes, and maintaining good hand hygiene.

Those with asthma or other respiratory illnesses are strongly encouraged to remain indoors as much as possible, ensure that inhalers and prescribed medications are readily accessible, and seek medical advice if symptoms worsen.

Schools, summer camps and workplaces are advised to reduce outdoor activities, including sports and extended breaks, and to keep windows closed where feasible. Operators are also encouraged to communicate clearly with parents and caregivers regarding protective measures for children.

MHES and PHD confirmed they will continue to monitor the situation closely in coordination with CINWS and will provide updates as conditions evolve. Residents are urged to follow official government channels for the latest information.