WATSON, Ill. (KSDK) -A massive search is underway in Effingham County, Ill. for a missing 7-year-old girl.
More than 400 to 500 volunteers have been searching near Willow Long's home in Watson, Ill. in Effingham County using infrared, canines, and ATVs.
During a Monday evening news conference, officials said no civilians will be involved in the search past 8 p.m. Trained emergency responders will be handling the search overnight and Tuesday.
An Illinois State Police FLIR Plane, which detects heat, will be used during the search after 10 p.m., when the ground cools down.
Twenty square miles had been searched as of 5 p.m. Monday.
Police say Willow's mother had a headache and laid down for 60-90 minutes. When she got up Willow's younger brother, a toddler, pointed at the door.
Police say no foul play is suspected. An Amber Alert has not been issued.
Willow is approximately four feet tall, and has shoulder-length red hair. It was previously reported that she was last seen wearing a long purple shirt, but it was found at her home.
She is not wearing her glasses.
As of 2 p.m. Monday, 18 square miles have been searched, and the search will resume after 5 p.m.
If you have see Willow, or know of her location, please call the Effingham County Sheriff's Department at (217) 342-2101.