One issue I have noticed since the shaking began is that some communication systems are being overwhelmed. I was unable to use my cell phone to home when I was out checking on my students. Also, I just tried to look at several emergency pages for Kumamoto City but have not been able to access them. I suspect that the sudden number of people attempting to access these pages has overwhelmed them. Obviously, servers that carry emergency information need to be prepared to handle sudden and huge increases in access attempts.
— Kirk