Brazil braces for heat wave followed by sharp cold snap this week

Extreme heat and humidity levels pose health risks including heat exhaustion and dehydration, particularly for vulnerable populations in affected regions.

For the sixth time in 2025, Brazil finds itself in the grip of a heat wave that pushes September temperatures far beyond their seasonal norms — a surge that will scorch the Center-West and press Southeast capitals toward their annual records before a cold front arrives, almost without warning, to reverse everything within days. The swiftness of this reversal is itself the story: not merely a hot week, but a portrait of a climate increasingly unwilling to hold still. In the immediate term, millions face real danger from heat exhaustion and dehydration; in the longer view, the frequency of such

Brazil braces for heat wave followed by sharp cold snap this week

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