SMHI has issued the highest fire risk forecast in several parts of south-eastern Sweden, including Stockholm, Uppsala, Norrköping and Gotland.

- This means that there is a stricter fire ban, you are not allowed to use open fire in forests and land, says Torbjörn Mattsson.

There are several reasons why a forest fire occurs.

Human behavior which may be that a fire has not been extinguished properly, sparks from forest machines or thunder.

It is above all the dry grass that poses the greatest fire risk.

- It burns like paper, says Torbjörn Mattsson.

It is the county administrative board that issues fire bans, which they have done in Uppsala.

Torbjörn Mattsson therefore now appeals not to light a fire in the forest.

- Bring ready-made food from home, you must not start a fire, he says.

See more in the clip above where Torbjörn Mattsson tells more about the risks of setting fire outside now.