If you look at the weather maps before the end of this week, you will probably start puffing. In the coming days, a ‘Spanish plume’ will provide tropical heat in our country. The RMI therefore announced a code yellow for the heat. But what exactly is this weather phenomenon? When does it reach its peak? How high will the temperature rise? And will this go together with heavy thunderstorms? HLN science journalist Martijn Peters explains.

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