HKO climatological data shows April mean maximums consistently range 26-28°C. Late April insolation, combined with urban heat island effects and typical thermal advection, almost guarantees exceedance of 25°C. The market likely underestimates this baseline thermal probability. We see robust low-level flow amplifying sensible heat, a clear YES. 95% YES — invalid if HKO issues a rare strong cold front warning for April 27th.