Last month hottest since 1980

Last month was the hottest June in Hong Kong for 30 years. The highest temperature was 34.5 degrees Celsius on June 9.

Many people enjoy swimming when it is hot. But there were nine serious cases of heatstroke during May and June. Heatstroke can be very dangerous.

Some workers want a law to stop building work when temperatures are too high. Workers say it is worse to have to work inside unfinished buildings. They say there is no air inside and it is much hotter than outside.

Five things to know about:

HOT WEATHER

1. The highest temperature ever recorded was 57.8 degrees Celsius at Al 'Aziziyah in Libya in 1922.