The Christ the Redeemer statue is illuminated in green and yellow, the colors of the Brazil's flag, to mark 100 days before the nation hosts the Olympic Games in Rio de Janeiro, Brazil, Wednesday, April 27, 2016. The Olympic flame was lit in Greece on Wednesday and will reach Brazil next Tuesday, starting in the capital of Brasilia. It will reach Rio's Maracana Stadium for the opening ceremony on Aug. 5. (AP Photo/Felipe Dana)

The countdown is on -- 100 days until the Olympics begin in Rio de Janeiro. Here's where things stand as Brazil prepares to host the games:
 
OVERVIEW
 
 
The first ever Olympic Games in South America are just around the corner. However, while excitement is building, Brazil is also facing myriad problems, which could impact the games.
 
WHO WILL BE PRESIDENT?
 
 
 
Brazil is in the midst of a economic and political crisis. President Dilma Rousseff is facing impeachment for allegedly breaking fiscal rules in her management of the federal budget. The turmoil is creating uncomfortable questions related the Olympics, such as who will inaugurate the games when they kick off in August.
 
SECURITY CONCERNS
 
 
Brazil is facing its worst recession since the 1930s. The crisis has led the government to sharply cut its security budget for the Games, creating concern about safety. Authorities say they have a good plan in place and security won't be an issue.
 
VENUES
 
 
In terms of construction, Rio de Janeiro is very close to being ready to host the Summer Olympic Games. However, there are many concerns about how well venues were built. A bike lane, built as a beautification project for the Games, recently collapsed, killing two people.
 
DIRTY WATER RISKS
 
 
An Associated Press investigation the last year has found alarmingly high levels of viruses and bacteria in bodies of water where athletes are set to compete.