From [1] UPI, with thanks to Twostellas:

As France prepares for the D-Day anniversary, the French Defense Ministry said Tuesday that the Vigipirate plan terror alert has been raised.

The terror alert was raised to the red level as France prepares for the 60th anniversary of the D-Day landings in Normandy on June 6, reported Xinhua, China's main government-run news agency.

But code red isn't the highest level. The highest level is scarlet.