Dangerous heat will expand across a greater portion of the area today, mainly west of Interstate 55, with heat indices reaching 110 to 115, a Facebook post warned.
The heat index is a measure that combines air temperature and humidity to estimate how hot it feels to the human body. High heat-index values increase the risk of heat-related illness, particularly for older adults, young children, people with chronic illnesses and those who work or exercise outdoors.
Public health guidance generally urges people to stay hydrated, limit strenuous outdoor activity during the hottest hours, seek air-conditioned locations when possible and check on vulnerable neighbors and family members. Heat waves can also strain power grids and disrupt outdoor events and transportation.
Officials and emergency responders often issue local heat advisories or warnings during episodes like this; residents should monitor local media and official channels for updates. We will provide more information as it becomes available.
