Shanghai at twilight

I am in Shanghai, China right now just starting my photo tour here. This evening my group and I went to the newly opened Shanghai Tower, which at present is the world's second tallest building. I took this shot from the observation deck on the 118th floor with a 24-105mm lens and the new Canon 1Dx Mark II. The clouds you see are from the tail end of a typhoon that hit this area quite hard in the past two days. Shortly after I captured this image, more clouds rolled in and then the city was completely obscured. It was a whiteout. My settings were 1/2 second, f/5.6, and 400 ISO. I used a tripod, the 2-second self timer on the camera in lieu of a cable release, and I blocked reflections in the glass from interior lights behind me by placing the lens up against the window and then using a small microfiber cloth to block any extraneous light from being seen by the lens.