Four records were broken yesterday as Hong Kong endured its 14th day of very hot weather.
Since the very hot weather warning was hoisted on May 18, Hong Kong has endured more than 300 hours of blazing heat, the longest since the warning system began in 2000.
The previous record was 286 hours from July 24 to August 5, 2007.
Another record was set yesterday - it was the 14th successive day in May of temperatures above 33 degrees. The 1963 record for scorchers was broken on Friday. This May also had the most hot-weather days.
The Observatory recorded 35.4 degrees at its headquarters in Tsim Sha Tsui at 2pm, the highest this year, and also the highest temperature in May since the 1976 record.
Tai Mei Tuk and Ta Kwu Lung recorded 37 degrees yesterday. Temperatures in Sheung Shui, Sha Tin and Happy Valley rose to 36 degrees.
The forecaster said the next couple of days will remain hot.
The maximum temperature today will be around 35 degrees in urban areas, and a couple of degrees higher in the New Territories.
Rain later this week will cool the city down a bit with temperatures ranging from 27 to 32 degrees.
The Observatory said: "An area of low pressure may develop over the South China Sea. The associated showers will affect the South China coast midweek next week."
Meanwhile, computer models in Europe and America forecast one to two tropical cyclone could be forming next week.
However, the Observatory's scientific officer, Andy Lai Wang-chun, said the public should interpret such forecasts with caution as satellites show no image of circulation at the moment.
Meanwhile, a 53-year-old woman surnamed Law, was airlifted to hospital after suffering from heat stroke at 1pm while hiking at Yuk Kwai Shan on Ap Lei Chau yesterday. She was in a critical condition in Pamela Youde Nethersole Eastern Hospital.
At 3pm, a 20-year-old woman surnamed Chu felt sick while hiking on Cape D'Aguilar Road in Chai Wan. She was treated on site.
Family doctor Lam Wing-wo said he had been seeing patients with heat exhaustion in recent days.
He reminded people heat stroke can occur even indoors. He said people should maintain adequate indoor ventilation.