The National Weather Service forecasts heat levels will reach 100 degrees or higher from Friday through Sunday. Courtesy of the National Weather Service

Heat and humidity remain on the rise across northern Illinois, and triple-digit heat levels are expected back by Friday.

The high temperatures will last through the weekend, according to the National Weather Service. Peak heat indices will reach 95-100 degrees on Friday and Saturday, and 90-95 degrees on Sunday.

Dos and don’ts during extreme heat

• Wear light-colored, loose-fitting, and lightweight clothing.

• Ensure children are wearing appropriate clothing and avoiding long periods of time outdoors.

• Avoid strenuous activity outdoors.

• Outdoor work should be minimized (Employers are recommended to avoid heavy-duty outdoor proje

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