The Antigua and Barbuda Meteorological Service has issued an excessive heat warning, alerting residents to prepare for extreme temperatures that could feel as high as 43°C (109°F). The warning, effective daily from 8:30 a.m. to 4:30 p.m. until Sunday, highlights the combination of light winds and high humidity, which will create perilously hot conditions, especially during early afternoons. The heat index, a measure of perceived temperature factoring in humidity and air temperature, is expected to peak at 43°C, surpassing the threshold of 41°C (106°F) that triggers such warnings. This threshold is typically activated when temperatures remain elevated for two or more consecutive days with wind speeds below 18 km/h (11 mph). The elderly, young children, individuals with chronic illnesses, and those engaged in outdoor activities are at the highest risk of heat-related health issues, including heat cramps, heat exhaustion, and potentially fatal heat stroke. Symptoms such as dizziness, nausea, headache, rapid heartbeat, extreme thirst, or confusion should prompt immediate action, including moving to a cooler environment, staying hydrated, and seeking medical assistance if necessary. Authorities are urging residents to take preventive measures, such as staying hydrated, avoiding direct sunlight during peak hours, and checking on vulnerable family members, friends, and neighbors. Additionally, individuals on medication are advised to consult their healthcare providers about potential heat-related risks. The extreme weather conditions underscore the importance of community vigilance and preparedness to mitigate the adverse effects of the ongoing heatwave.