The red alert has been activated in about 3,000 cities across Brazil as a result of an extreme heat wave that has swept the country.
Records were broken in many areas including Rio de Janeiro, where temperatures reached 52.5C.
More than a hundred million people have been affected by this heat wave, which is expected to last until at least Friday.
Officials attribute it to the El Nino phenomenon and climate change.
Extreme weather is becoming more frequent and more intense in many parts of the world due to climate change.
According to scientists, heat waves are becoming longer and more intense in many countries, and this is expected to continue as humans continue to emit greenhouse gases that warm the planet. (A2 Televizion)
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