Summer heat is coming - up to 20 degrees, says SMHI

After a period of unstable weather, the heat looks set to roll in on a broad front starting on Wednesday. And the heat looks set to stay for a while.

Then it could reach around 20 degrees in some places, says Moa Hallberg, meteorologist at SMHI.

But there is some uncertainty for northern Norrland, where a precipitation area could move in on Wednesday and bring lower temperatures.

But it may only affect Finland, says Hallberg.