Photo date: October 26, 2016. Photographer: Mark Mahin.
The photo below (taken on a dry night) shows a huge swarm of orbs above a building in New York City. My eyes could not notice anything unusual in the air, and there was no unusual smell.
I took the photo at 9:10 PM. The previous photo, taken a few seconds earlier (also at 9:10 PM), showed not a single orb.