GRAND CAYMAN, Cayman Islands (25 June 2026) – The Mosquito Research and Control Unit (MRCU) reports that after facing elevated mosquito numbers this month, the figures are finally trending downwards. While the current activity still is higher than most residents would consider comfortable, trap data shows a significant decrease from the June peak of 9,309 mosquito collections on the 18th, down to 4,723 by June 22nd.
The data provides a positive signal, but MRCU is warning the public to remain vigilant. Recent rainfall, which created significant standing water and ideal breeding conditions, is expected to trigger another emergence of mosquitoes, likely within the next 10 days.
MRCU crews continue to utilize a multi-pronged strategy to combat the population explosion. Aerial operations, prioritizing blocks with the highest recorded activity based on data and field assessments, are conducting larviciding and adulticiding. The effective three-hour window for aerial operations is severely limited by evening weather. Operations must be cancelled if unsafe conditions or rain are detected, preventing treatment for that day.
Supporting these aerial efforts are ground-based fogging trucks, which are particularly helpful in targeted, smaller communities. They are also weather-dependent and cannot operate effectively during heavy rain.
MRCU emphasizes that control efforts extend far beyond spraying. Field teams are inspecting known breeding sites, analyzing data, conducting community outreach, and responding to public complaints. These operations directly support the Cayman Islands Government's priority of promoting a healthy, empowered citizenry.
Residents are reminded that they play a crucial role in managing the population by:
"We thank the public for their continued patience," stated a spokesperson for the MRCU. "Our teams are working tirelessly around the clock to respond to these weather-driven hatches and reduce the burden of mosquitoes across our communities."