I have had 3 strokes in 2 years Bro, hopefully they were not severe and hell be right back on his feet in no time. Make sure you ask his Dr. if he is diabetic and have them check him for "DVT" Deep Vein Thrombosis which leads to strokes. They are blood cloths in your legs and or lungs, but from what I was told you can get them in your main arteries which impeded oxygen to your brain and cause the strokes.
Hope your Dad is fine Bro, keep your chin up!