The World Meteorological Organization, defines a heat wave as five or more consecutive days of prolonged heat in which the daily maximum temperature is higher than the average maximum temperature by 5 °C (9 °F) or more. However, some nations have come up with their own criteria to define a heat wave.
Zo dan hebben we hier een hittegolf (norm Jabbeke KMI 1991/2020) vanaf 27,6°C in juli en 27,8°C augustus als grens 5x.
Op de dijk kan je er zeker 1,5/2° afdoen. En in de kempen zit je dan weer 1,5/2° hoger.