Yellow

Meteolux has put a yellow alert in place for thunderstorms, for the whole country, on Friday afternoon between 2 and 8pm. Thunderstorms could be accompanied by hail, strong winds of between 60 and 80 km/h, and heavy rainfall of between 15 and 30 litres per square metre in a short time.[1]

The yellow alert was for heat. Now the yellow alert is for thunderstorms. The colour stayed. The hazard changed. Nine days of yellow for heat. Now yellow for storms. The alert system does not distinguish between what you are warned about. It distinguishes between how bad it is. Yellow is the lowest level. Yellow is "be aware". Orange is "be prepared". Red is "act now".[1]

The heatwave had a red alert. The heatwave had orange alerts. The heatwave ended with a yellow alert for thunderstorms. The cascade does not end when the temperature drops. It changes form. The heat becomes the storm. The drought becomes the flood. The yellow alert becomes the yellow alert. The colour stays.[1]

15 to 30 litres per square metre in a short time. The ground is dry. The ground has been dry for nine days. Water on dry ground does not soak in. It runs. The Sûre is at a record low. The Moselle is at a record low. The rain will fall on a country that cannot absorb it. The rain that does not soak in becomes the flood that runs to the river that is too low to carry it. The yellow alert is for thunderstorms. The yellow alert should also be for what happens after.[1]