The summer vacation will start tropical this year. The mercury rises more quickly above 30 ° C after the weekend, and that for several days. The first heat wave of the year therefore seems to be in the making. Some weather models even predict temperatures that flirt with 40 ° C. What is the chance of a heat wave? Are we going to break the hairstic record? And what is the Hittlachtel that is at the basis of this heat? HLN science journalist Martijn Peters explains.

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