A new daily temperature record was broken on Sunday in Brussels at the start of the afternoon, as 31.1°C was recorded, meteorologist David Dehenauw confirmed Twitter.
The previous record observed for an August 14 - since temperatures were recorded - dates back to 1911 and stood at 31 degrees.
However, it will be necessary to wait until the end of the day to know the final result, underlines the meteorologist.
Belgium has officially been in a heat wave since Saturday.
Yesterday, the temperature in the country again exceeded 25 degrees Celsius, for the fifth day in a row.
For the record, a heat wave in Belgium is defined by temperatures above 25°C for at least five days, with the mercury exceeding 30° for at least three days.