World blackout on November 17: what is a rumour and what the emergency kit really means
A claim of a global blackout on Tuesday spread online. There is no basis for it. What exists is a preventive emergency-kit recommendation from Brazil's Civil Defence and a US alert test.
Reviewed by Jackson on Nov 14, 2026. How we work
Quick answer
Messages online claimed a worldwide blackout would hit on November 17, 2026, lasting up to 90 days. Fact-checkers rated the story false. It combines a 2023 Simpsons episode, a US emergency alert test and Brazil's preventive emergency-kit advice. Brazil's Ministry of Integration said the kit guidance is not linked to any blackout forecast.[1][2]
In this article
Why it mattersWhere the story came fromWhat the authorities sayWhat the emergency kit isWhat you can doWhat we don't know yetSourcesKey points
- No worldwide blackout is forecast for November 17, according to the fact-checks published so far.[1][2]
- One of the clips comes from 'It's a Blunderful Life', the seventh episode of season 35 of The Simpsons, aired on November 19, 2023. It shows a blackout in the fictional town of Springfield.[1]
- Brazil's Ministry of Integration and Regional Development said the kit guidance is preventive and has no link to any national or global blackout forecast.[1]
- The US emergency alert test is real and was scheduled for the same day. It uses radio and TV and does not shut down power or internet.[1][2]
Why it matters
Rumours about disasters spread fast and can cause panic and unnecessary purchases. Knowing where such stories come from helps readers check before sharing, and prepare in a practical way. Checking a claim takes a few minutes, and official websites are the fastest place to start.[1]
Where the story came from
The version that circulated mixes three unrelated things. The first is a Simpsons scene in which a blackout hits Springfield, a fictional town. The second is a US national test of the emergency alert system, scheduled for the same date. The third is Brazil's Civil Defence advice to keep a kit for 72 hours at home.[1]
Put together, the pieces looked like a warning. According to Aos Fatos, the theory gained traction through coincidences of dates, but the 2023 episode does not mention any worldwide blackout.[2]
What the authorities say
On November 7, the Ministry of Integration and Regional Development said the emergency-kit guidance is preventive. According to the ministry, it is not linked to any forecast of a national or global blackout.[1]
The same recommendation was already published in March and April 2026, which shows it is not a new alert.[1]
What the emergency kit is
The recommendation is to keep supplies for the first 72 hours of an emergency, because rescue teams can take time to reach some places. The list includes water, non-perishable food, ongoing medication, copies of prescriptions, hygiene products, a torch, batteries, a radio and identity documents.[1]
What you can do
- Before sharing a blackout alert, check it on the Civil Defence website or in a fact-check.[1]
- Build a 72-hour kit from what you already have at home, and check expiry dates and batteries.[1]
What we don't know yet
- As of this text, we found no official notice from Brazil's grid operator ONS or any other power authority about November 17.
- The fact-checks were published before the date. Check whether a new version of the rumour has appeared since.
Sources
- Gazeta do Paraná: Checagem: apagão mundial em 17 de novembro, entenda a origem do boato e o que dizem as autoridades (accessed Nov 14, 2026)
- Aos Fatos: Defesa Civil, militares, Simpsons e apagão mundial (accessed Nov 14, 2026)