Even not considering financials, I'd expect at least 1 death from people looking up medical information and not being able to get it if Google was entirely gone for a whole day.
EDIT: Of course most reasonable people will contact a medical professional rather than an internet search engine, that's why I guessed "at least 1" instead of "at least a couple hundred".
EDIT: Of course most reasonable people will contact a medical professional rather than an internet search engine, that's why I guessed "at least 1" instead of "at least a couple hundred".