Thousands of students have been excluded from school across northern Illinois this year because they sat on the bus, at lunch or in a classroom next to someone who tested positive for COVID-19.The reason makes sense: To limit the spread of COVID-19 in schools.









That siren means something life-threatening is happening, the National Weather Service says. Whether it’s a tornado, strong wind, hail or another emergency depends on the agency that controls the sirens going off.