Summer can be the cruelest season when the mercury soars past the hundred degree mark and the nights are almost just as hot. Without an electric fan or air conditioner, sleep can be reduced to an incessant tossing and turning. The Spanish town of Bollullos (Huelva) was certainly a perfect example of this unrelenting heat in the month of July 1975, when what little relief offered by mechanical cooling devices was interrupted by a sudden, unexpected blackout.
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