EXCESS DEATHS IN SPAIN SURGE TO 37%, AS EUROPE ALSO SEES SHARP RISE IN MORTALITY RATES
Figures from the European Union’s statistics agency show a sharp rise in excess deaths in July, with Spain and Cyprus recording death rates higher than the average EU excess mortality during the peaks of the Covid crisis.

Spain recorded an excess mortality rate of 36.9%, Eurostat said, while Cyprus had deaths 32.9% above average.

Across the EU, excess deaths averaged at 15.8% in July, with some commentators blaming the lockdown effect, where waiting lists grew and people had difficulty accessing healthcare during lengthy Covid restrictions. Others point to the heatwave that hit Europe this summer, though some countries, such as the Netherlands, have seen rising excess deaths outside of the period of unusually hot weather.
[gript.ie]

It appears the the wave of excess mortality begins at around mid April '21.
What might have been happening then?