Measures of what researchers call “excess mortality” — the difference between the normally expected number of deaths and the actual — spiked in June.

At least 12,000 excess deaths were recorded across nine European countries during June's heatwave, national statistics indicated, a toll that could yet rise as more data is…

At least 12,000 excess deaths were recorded across nine European countries during June's heatwave, national statistics indicated, a toll that could yet rise as more data is…