The frost advisory and freeze warning could lead to significant impacts on agriculture and outdoor plants. Sensitive vegetation may be killed if left uncovered, and unprotected outdoor plumbing could sustain damage. Areas near and west of the Fox Valley and north of I-80 are particularly at risk. Residents in affected counties, including McHenry, DeKalb, and Kane, should take precautions to protect crops and plants. The NWS has also noted that frost is possible again early Sunday morning, extending the potential risk to vegetation.