O fornecimento de eletricidade voltou hoje.

Fornecimento means supply or provision. In this sentence, o fornecimento de eletricidade means the electricity supply.

So the sentence is literally something like:

The supply of electricity returned today.

In more natural English, you would often say:

• The power came back today.
• Electricity was restored today.

O is the masculine singular definite article, meaning the.

Here, fornecimento is a masculine singular noun, so it takes o:

• o fornecimento = the supply

It is used because we are talking about a specific supply: the electricity supply in that place.

Because fornecimento de eletricidade works like supply of electricity in English.

With nouns like fornecimento, Portuguese often uses de + noun to describe what is being supplied:

• fornecimento de água = water supply
• fornecimento de gás = gas supply
• fornecimento de eletricidade = electricity supply

Using da eletricidade would sound more like the supply of the electricity, referring to some very specific electricity already identified, which is not the normal way to say this.

Yes. Voltou is from the verb voltar, which basically means to return, to come back, or to go back.

Literally:

• voltou = returned / came back

In context, when talking about electricity, water, internet, etc., Portuguese often uses voltar in the sense of coming back after an interruption. So:

• O fornecimento de eletricidade voltou hoje.

naturally means:

• The electricity supply came back today.
• Power was restored today.

So even though the verb is literally returned, the natural English translation may be was restored.

Voltou is the pretérito perfeito do indicativo — the simple past / preterite.

It refers to a completed event in the past:

• volta = returns / comes back
• voltou = returned / came back

So the sentence says that the return happened today, as a completed event.

Putting hoje at the end is completely normal in Portuguese.

• O fornecimento de eletricidade voltou hoje.

This is a neutral word order: subject + verb + time expression.

You could also say:

• Hoje o fornecimento de eletricidade voltou.

This gives a bit more emphasis to today.

Both are correct. The original version is very natural and straightforward.

Yes, absolutely. That is very natural and probably more common in everyday speech.

• A eletricidade voltou hoje. = The electricity came back today.

The version with o fornecimento de eletricidade sounds a bit more formal, technical, or official, like something you might read in a notice, report, or announcement.

So:

• A eletricidade voltou hoje. → more everyday
• O fornecimento de eletricidade voltou hoje. → more formal/administrative

Yes, eletricidade is the modern standard spelling.

You may also see electricidade in older texts or older spelling conventions. In present-day standard Portuguese, especially after spelling reforms, eletricidade is the expected form.

So for modern European Portuguese, eletricidade is correct.

Yes, but it sounds somewhat formal.

In real life, people might more often say:

• A luz voltou hoje. = The power came back today.
• A eletricidade voltou hoje.
• Já temos eletricidade outra vez. = We have electricity again now.

The original sentence is still perfectly natural, especially in official communication, service updates, news, or utility-company language.

Portuguese can use a passive structure, but it does not have to.

A more passive-style version would be:

• O fornecimento de eletricidade foi restabelecido hoje.

That means:

• The electricity supply was restored today.

This sounds even more formal and official.

The original sentence with voltou is simpler and more direct. Portuguese often prefers this kind of active-looking structure where English might choose a passive translation.

They are close in meaning, but not identical in tone.

• voltou = came back / returned

  • simpler
  • more direct
  • common in everyday language

• foi restabelecido = was restored

  • more formal
  • more technical or official
  • common in reports, notices, and announcements

So:

• O fornecimento de eletricidade voltou hoje.
  = natural, clear, slightly formal

• O fornecimento de eletricidade foi restabelecido hoje.
  = more bureaucratic or official

Sometimes, yes, depending on context.

Literally, fornecimento is supply. But in natural English, when talking about utilities, people often say service:

• electricity supply
• power service

So this sentence could be understood as:

• The electricity supply returned today.
• Electricity service resumed today.

However, the most natural everyday English translations are still usually:

• The power came back today.
• Power was restored today.