Atlantic

The destroyer HMS Blanche is lost to a magnetic mine in the Thames Estuary.

France, Politics

Col Charles de Gaulle, concerned at the apathy of the French government, prepares a report urging more stringent preparations against invasion. His warnings are ignored.

Holland

• The Dutch reinforce border troops and cancel all Army leaves and prepare to flood inundation areas if necessary.
• U.S. citizens in the Netherlands are advised by their consulate to leave the country.

Western Front

German troops are sent to reinforce the Siegfried Line. The governmnet of the Netherlands orders the opening of the floodgates to the main defensive area.