Opus 5.5 apparently built https:// somethingbig.ai/world with a weather system that matches whatever weather is in NYC at the time... So with the nor'easter, there's rain, and the NPCs are carrying umbrellas! It's the little things :)
Opus 5.5 World Syncs Live NYC Weather, NPCs Carry Umbrellas
Per mattshumer_, Opus 5.5 built somethingbig.ai/world with a weather system matching real-time NYC weather — during the nor'easter's rain, NPCs in the world carried umbrellas.