Personnel from the Civil Defense and municipalities have prepared gymnasiums and schools as shelters in case of evacuations. At least 10 highways in Rio Grande do Sul were blocked by cyclone damage.
In Florianopolis, the capital of Santa Catarina, a plane skidded at the city's airport and could only be removed from the runway on Thursday morning. The incident caused no injuries or material damage but caused the cancellation of dozens of flights.
The state of Parana issued an "orange alert" for the cyclone, which is also leaving strong gales in southeastern states such as Sao Paulo and Rio de Janeiro.
Extratropical cyclones, sometimes called mid-latitude cyclones or wave cyclones, are low-pressure areas which are capable of producing from cloudiness and mild showers to severe gales, thunderstorms, blizzards, and tornadoes.