From CBC News:
Warning signs of stroke
Call 911 or your local emergency number immediately for help.
- Weakness: Sudden loss of strength or sudden numbness in the face, arm or leg, even if temporary.
- Trouble speaking: Sudden difficulty speaking or understanding or sudden confusion, even if temporary.
- Vision problems: Sudden trouble with vision, even if temporary.
- Headache: Sudden severe and unusual headache.
- Dizziness: Sudden loss of balance, especially with any of the above signs.