In the Grand Finale, Mandarin created an anti-technology fog that effectively shut down New York City and Hong Kong, including life support (Tony and M.O.D.O.K.), air traffic (Force Work's jet, a helicopter, and the jetboots for the armors), the armors, and that we saw looting and a fire started (started from the helicopter crash). Keeping this in mind, that means other air craft that were in the air crashed, people are in hospitals on life support and/or in dire need of medical care probably died, and emergency services were likely impeded. And then there's the people with pacemakers, electronic respirators at home and in hospitals, etc, etc... The Mandarin was probably responsible for the deaths of hundreds, thousands, hundreds of thousands, even millions of people.
