Under level 4, the number of major public events will be reduced, and police and military presence remain high. A lot of police effort will be focused on public transport, rail stations, shopping streets and other places with big crowds.

Contrary to what was expected, Brussels metro services will not resume. All schools and universities, kindergartens, shopping and leisure centres are keeping their doors shut as well. The OCAD will re-evaluate the situation tomorrow afternoon and announce a new decision. Rail services should not be affected (apart from a local strike in Hainaut province) , but the Brussels Schuman station will remain closed. The Flemish municipality of Vilvoorde has also decided to suspend all school activities.

Several companies allow staff to work from home or to take a day off, like the banking groups Belfius (which informed some 2,200 staff via a text message) and KBC.

Michel said that "we realise that this a difficult situation for everyone" and explained that "we are bending over backwards to have the situation return to normal as soon as possible."