Preparing the Philippines with one day's warning

What should MacArthur's replacement do with 24 hours' warning before the Japanese invasion of the Philippines?

Execute the war plans immediately: disperse forces and aircraft, keep fighters ready or airborne, protect exposed positions, and move civilians away from likely combat zones.

With 24 hours before the Japanese attack, the priority would be to execute existing war plans rather than devise a new campaign. Troops and aircraft would disperse to prepared defensive positions, and fighters would remain airborne or at maximum readiness. Forces and equipment in exposed peacetime locations would be moved or protected. Civilians would be dispersed away from likely combat zones where time allowed. These measures would preserve more combat power for the invasion, although one day would not repair the campaign's deeper logistical and command weaknesses.