In May and June, children across the country participate in the Evening Four Days. Extreme weather such as thunderstorms, storms, and heat can cause problems. If the KNMI issues an orange or red warning, we advise postponing the walk. But what if we expect some thunderstorms with high uncertainty?

The KNMI has a legal duty to warn for dangerous weather. We notice that especially thunderstorms, which occur regularly at this time of year, cause confusion.  

The meteorologists in our weather room monitor the weather day and night. Thunderstorms – with a chance of heavy rain, gusts of wind, hail, and lightning - are usually very localized. We see the thunderstorms coming, but where and when it happens is often uncertain until the last moment. Therefore, keep an eye on the KNMI app for the current situation and warnings.

Safety advice during dangerous weather:  

• Follow the current situation via the KNMI app, even just before departure.
• Postpone the walk during orange or red warnings. 
• Avoid open areas (such as fields, sports fields, or dikes) and open water (such as ditches, ponds, or lakes). 
• Stay away from bridges, as it is extra windy there. 
• Do not shelter under a tree. Branches can break and trees can fall over. 
• Do not use umbrellas and stay away from tall objects like lamp posts or masts.

If you are caught in a thunderstorm during the walk: 

• Make yourself small. Spread the children out and have them crouch, with feet together. 
• Wrap your arms around your knees and do not lie flat on the ground. 
• As a group, do not stand or sit together, as this reduces the risk of a strike. 

See all advice on thunderstorms, strong wind gusts and heat.