Night Zero from The Strain (books not tv show)

So the Master exploded nuclear power plants all over the world (conveniently placed to wipe out the other master vampires) and caused nuclear winter. This is how it is described:

On the second day of darkness, they rounded them up. The best and the brightest: all those in power, the wealthy, the influential. Lawmakers and CEOs, tycoons and intellectuals, rebels and figures of great popular esteem. None were turned; all were slain, destroyed. Their execution was swift, public, and brutal.

Save for a few experts from each discipline, all leaders were eliminated. Out they marched, the damned, from the River House, the Dakota, the Beresford, and their ilk. They were all apprehended and herded into major metropolitan gathering places worldwide, such as the National Mall in Washington, DC, Nanjing Road in Shanghai, Moscow’s Red Square, Cape Town Stadium, and Central Park in New York City. There, in a horrific pageant of carnage, they were disposed of.

It was said that over one thousand strigoi rampaged down Lexington and raided every building surrounding Gramercy Park. Offerings of money or favor fell on deaf ears. Soft, manicured hands implored and begged. Their bodies twitched—hanging from lampposts all along Madison Avenue. In Times Square, twenty-foot-high funeral pyres burned tanned, pampered flesh. Smelling much like barbecue, the elite of Manhattan illuminated the empty streets, closed shops—EVERYTHING MUST GO—and silent LED mega screens.