Thunderstorms and heavy rains are expected to hit the eastern and southern provinces on Tuesday afternoon, Weeronline expects. Meteorological institute KNMI issued a code yellow storm warning taking effect from noon.
The storms may be accompanied by lightning, hail and strong winds blowing between 75 and 90 kilometers per hour, according to Weeronline.
"Avoid open water and open areas, don't shelter under trees", the KNMI warns. "Follow weather reports and warnings."