The Norwegian Meteorological Institute has issued a yellow warning for lightning and torrential rain in Østafjell on Wednesday afternoon.
Around 3 pm, the easternmost parts of Eastern Norway have already been hit.
– It has hit several places in Eastern Norway, especially the easternmost part with Østfold, Akershus and southern parts of Hedmark, says meteorologist Trond Lien to Dagbladet at 15.
– There is a lot of lightning, he says.