People cool off in a pool during a heatwave in Madrid.

New heatwave grips Spanish capital

People working outdoors in Madrid as temperatures are nearing 40 degrees Celsius. 

People working outdoors in Madrid as temperatures are nearing 40 degrees Celsius. 

A sweltering heat is keeping thirteen Spanish communities on alert, with the highest incidence in Galicia, where there is a red warning for high temperatures of up to 42 degrees, according to the State Meteorological Agency's (Aemet) website.

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