FORT WAYNE, Ind. (WOWO): The National Weather Service has issued an Extreme Heat Warning for Northeast Indiana through Thursday evening, as a prolonged stretch of dangerous heat and humidity moves into the region.

According to the National Weather Service, afternoon high temperatures will climb into the lower and middle 90s each day this week, but the humidity will make it feel even hotter. Peak heat index values are expected to range from 100 to 105 degrees, creating dangerous conditions for anyone spending extended time outdoors.

Forecasters say one of the biggest concerns will be the lack of overnight relief. Temperatures will only fall into the mid-70s at night, preventing homes and buildings without air conditioning from cooling down. Meteorologists also note the recent stretch of cooler weather may make the upcoming heat feel even more intense than normal.

The dangerous conditions are expected to persist through Thursday, with little relief until late in the week. The National Weather Service says the next meaningful chance for rain does not arrive until Friday, when scattered thunderstorms could begin to break the heat.

Heat-related illnesses become much more likely during extended periods of extreme heat. The National Weather Service urges residents to drink plenty of water, remain in air-conditioned buildings whenever possible, limit strenuous outdoor activities during the hottest part of the day, and check on elderly neighbors, young children, and anyone without adequate cooling. Page three of the weather briefing also highlights that pregnant women, newborns, children, older adults, and people with chronic illnesses face the greatest risk during extreme heat events.

Officials also remind residents to never leave children or pets inside a parked vehicle, where temperatures can become deadly within minutes.