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  2. Warning sirens sound as multiple tornadoes touch down near ...

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    Warning sirens could be heard ringing out in downtown Chicago as multiple tornadoes touched down close to the city on Wednesday 12 July. The eerie sound could be heard in footage posted by Twitter ...

  3. Severe thunderstorm warning - Wikipedia

    en.wikipedia.org/wiki/Severe_thunderstorm_warning

    The warning is then disseminated to the public through terrestrial television and radio stations, online media, mobile app and SMS messaging through Emergency Mobile Alert (EMA); if a tornado has been sighted or indicated by radar within the warned area during the severe thunderstorm warning's duration, civil defense sirens, if present, are ...

  4. Video shows passengers sheltering in place at Chicago ... - AOL

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    The National Weather Service in Chicago issued 16 tornado warnings on Monday around the region, the most in a single day in 20 years. This included Cook and DuPage counties, where O'Hare and ...

  5. Civil defense siren - Wikipedia

    en.wikipedia.org/wiki/Civil_defense_siren

    A civil defense siren is a siren used to provide an emergency population warning to the general population of approaching danger. Initially designed to warn city dwellers of air raids (air-raid sirens) during World War II, they were later used to warn of nuclear attack and natural disasters, such as tornadoes (tornado sirens).

  6. Tornado touches down near Chicago's O'Hare airport ... - AOL

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    A short time later, the weather service said the Chicago forecast area was “currently tornado warning free.” Tornado touches down near Chicago's O'Hare airport, disrupting hundreds of flights ...

  7. 2021 Naperville–Woodridge tornado - Wikipedia

    en.wikipedia.org/wiki/2021_Naperville–Woodridge...

    The non-profit Naperville Tornado Relief raised over one million dollars to aid in cleanup effort in 2023, while some repairs were still ongoing as of 2024. It was the strongest tornado in the Chicago metropolitan area since the 2015 Coal City tornado, and the first major tornado in DuPage County since the 1976 Lemont tornado. [2]

  8. Tornado tears through Chicago as video captures thousands ...

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  9. Siren (alarm) - Wikipedia

    en.wikipedia.org/wiki/Siren_(alarm)

    A siren is a loud noise-making device. Civil defense sirens are mounted in fixed locations and used to warn of natural disasters or attacks. Sirens are used on emergency service vehicles such as ambulances, police cars, and fire engines. There are two general types: mechanical and electronic.