An urgent alert has been issued by the National Weather Service's official X account, @NWSTornado, on social media, warning that a tornado emergency will remain in effect until 7:00 PM CDT due to ongoing severe conditions in the region.
The alert states, "This is a life threatening situation. Seek shelter now!"
"Tornado Emergency including Marion IL, Harrisburg IL and Carrier Mills IL until 7:00 PM CDT".
A tornado emergency is the highest level of alert issued by the NWS and this specific one puts 41,000 people, three and 19 schools at potential risk from the tornado.
The warning signifies a large and destructive tornado has been confirmed on the ground, posing an immediate threat to life and property, reports .
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Residents in the affected areas are being urged to seek shelter immediately.
People are advised to move to a basement or an interior room on the lowest floor of a sturdy building, away from windows and doors.
Storm chasers and emergency crews have reported extensive damage in nearby areas, although official reports from authorities are still forthcoming.
Illinois is no stranger to tornadoes, with the state ranking among the top 10 in the U.S. for tornado activity.
Known for its flat terrain and location in "Tornado Alley," Illinois experiences an average of around 50 tornadoes per year.

The most active months are typically April through June, though twisters can strike at any time of year.
Tornadoes in Illinois can range from fleeting EF-0s to formidable EF-4 and EF-5 beasts, boasting winds that surpass 200 mph.
When the weather conditions are ripe for such events, locals are strongly advised to heed warnings, given that storms can materialise rapidly, leaving scant time to find refuge.
We'll keep you posted with real-time updates as this perilous situation evolves.
In the meantime, remain indoors, stay safe, and adhere to all directives issued by emergency authorities.
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