MARION, OH (MARION COUNTY NOW)—A heat advisory remains in effect across portions of north central, northeast and northwest Ohio until 8 p.m. EDT Wednesday, with forecasters warning that high temperatures combined with humidity could make it feel as hot as 100 degrees.

The National Weather Service issued the advisory as a result of elevated heat index values expected throughout the day. Officials warn that prolonged exposure to these conditions could lead to heat-related illnesses, particularly for vulnerable populations such as older adults, children and those working outdoors.

Communities across northern Ohio, including areas in Crawford County and surrounding regions, are expected to experience the peak heat during the afternoon hours. Emergency management and public health officials are urging residents to take precautions to stay safe.

“Hot temperatures and high humidity may cause heat illnesses,” the advisory states, emphasizing the need for awareness and early action when symptoms appear.

Health experts recommend limiting outdoor activity during the hottest parts of the day, especially strenuous work or exercise. If outdoor activity is necessary, residents are advised to schedule it for early morning or late evening hours when temperatures are typically lower.

Wearing lightweight, loose-fitting clothing and staying hydrated are also key preventative measures. Officials stress the importance of recognizing the signs of heat exhaustion and heat stroke, which can include dizziness, nausea, rapid pulse and confusion.

Cooling centers may be available in some communities, and residents are encouraged to check with local authorities for locations and hours. Pets should also be monitored closely, as pavement and high temperatures can pose dangers to animals left outdoors.

The heat advisory is expected to expire at 8 p.m., when temperatures are forecast to gradually drop. However, residents are urged to remain cautious as lingering humidity may continue to create uncomfortable and potentially hazardous conditions.