In total, 2964 people died in the Netherlands during the week that started on July 22, the CBS said, which was around 15% more than during an average week in the summertime.

Temperature records tumbled across Europe during late July's heatwave, and for the first time since records began topped 40 degrees Celsius (104 Fahrenheit) in the Netherlands on July 25.

The death toll in the Netherlands during that week was comparable to the rate during two heatwaves in 2006, which were among the longest ever in the country, the researchers said.

About 300 of the additional fatalities were among people aged 80 years and older.

Most of the deaths occurred in the east of the Netherlands, where temperatures were higher and the heatwave lasted longer than in other parts of the country.

The Netherlands has a total population of around 17 million.

The heatwave was the second to hit Europe in a month, and climate specialists warn such bursts of heat may become more common as the planet warms up due to greenhouse gas emissions.