There is also a risk of thunder during the rain. When the rain comes for a short time, it can cause flooding in, among other places, basements, viaducts and stormwater systems.
- After the high summer heat that has been, we now get a cooler air, and with it the warmer air is pushed upwards into the atmosphere. Then large clouds, thunderstorms and a lot of rain begin to form, says Tora Tomasdottir, meteorologist at SVT.
The counties affected are Örebro, Dalarna County except the valley mountains, Värmland, Västmanland, Södermanland and Östergötland.