Multiple tornadoes ripped through the Dallas-Fort Worth area on the evening of Oct. 20. The tornadoes that touched down ranged up to EF-3, according to the National Weather Service.

When severe weather hits, the weather service may issue a tornado watch or a tornado warning. A tornado watch means that tornadoes are possible in the area, but they are not confirmed. The weather service will issue this alert as a way to tell people to prepare to take cover. People should identify a safe room and get supplies ready.

A tornado warning means a tornado has either been sighted or confirmed by radar. When this warning is issued, people should immediately take cover. The weather service suggests moving to an interior room on the lowest floor of a sturdy building. This room should be away from windows.

Residents who want to receive weather-related emergency notifications can sign up for the city’s CodeRED system at www.friscotexas.gov.