Brazil is running out of time.

World Cup organizers will mark 100 days to go on Tuesday with work still to be done on stadiums and infrastructure in the 12 host cities.

As national teams enter their final phase of preparations — Wednesday in the only date this year before mid-May that all players are available to national teams — the Brazilian government is trying to ensure the country will be prepared for the 32-nation tournament, which opens June 12.

There are four stadiums still under construction, and work outside many of the venues is far from over. Doubts also remain about whether host cities will be able to meet FIFA's requirements for fan areas with outdoor viewing screens.