Persistent heat wave conditions across Southern California, driven by strong high pressure and warm offshore flow, have elevated overnight lows into the mid-70s°F through August 28, limiting nocturnal radiative cooling. National Weather Service guidance and multiple forecast models indicate a daily minimum near 73–79°F at key Los Angeles stations, consistent with recent climatological trends of unusually warm coastal waters sustaining humidity and reducing temperature drops. Trader sentiment favoring 67°F or below (46% implied probability) alongside clustered bets in the 72–79°F ranges reflects uncertainty around marine layer intrusion timing or model spread in the final forecast updates, with resolution hinging on the official recorded low from authoritative meteorological observations.