In this question, I asked what would happen if a supernatural EMP hit an urban-fantasy Earth. The answers pointed out a flaw in my assumption: an EMP, supernatural or otherwise, would not likely have the effects I need. Oops!
Therefore, assuming a modern urban fantasy setting (thus, the world is "ours" in the present time, with the known continents, cities, technology, and general environment), what kind of singular event could do all the following, without also wiping out life as we know it?
a) Disable or destroy all manmade satellites (and thus a lot of communication);
b) Take down the power grid for weeks;
c) Render communication via cell phones and computers virtually impossible for the forseeable future;
d) Other effects optional!
Assuming my bad guy successfully triggers this event, whatever it is, what would be the effect on the following systems in particular?
a) How would cars - from old, non-computerized models up to the Tesla - react? Would they be disabled, and if so, for how long?
b) How would hospitals react? Would an event capable of knocking out power on this scale temporarily or permanently disable their backup generators, or would they be able to switch over with little to no disruption?
c) Are there any other major side effects, either on manmade structures or on the environment?
The event can be a one-off phenomenon, such as a solar flare or EMP detonation; or it can be some kind of ongoing thing (like fluctuating magnetic fields or something). The main goal is to achieve those three primary effects all via a single mechanism. (If the answer is, "no known real-life event can do all those", that's fine too! The bad guy has Magic(tm) so I can fudge a little; I'm just hoping to ground the magic effects in as much science as possible for realism's sake.)