Hongkongers sweated and fretted as the temperature climbed to 35 degrees Celsius in various districts, prompting the first extreme heat special weather tip from the Hong Kong Observatory since the service was launched Friday. SING TAO Previous NextThe Hong Kong Observatory yesterday issued its first extreme heat special weather tip as temperatures climbed to 35 degrees Celsius in several districts, including at the Sheung Shui basketball ground which hit 40 degrees. The extreme hot weather was due to the outer subsiding air of Typhoon Mawar affecting the coast of southern China. The observatory advised citizens to keep track of their health condition, drink more water, take heatstroke prevention measures and seek medical advice if they feel unwell. Monitoring stations in some districts recorded an Air Quality Health Index of 10+ - indicating a serious health risk.