Temperatures reached 36.7°C in the city of Geneva on Wednesday, slightly down on the previous day.
An increasing number of local and regional authorities have announced a ban on open fires and fireworks near forests as a precautionary measure.
Water levels in several rivers and lakes have dropped low as experts warn of a serious risk for fish and reptiles.
The authorities in the mountain resort of Nendaz decided to refill a mountain lake situated at more than 2,200m above sea level. The Tracouet LakeExternal link is home to a large population of amphibians and exceptional alpine flora.
The River Aare, popular with swimmers in the Swiss capital, Bern, reached a record 23.9°C.
Thunderstorms and hail, notably in the Bernese Oberland region and in western Switzerland, brought temporary relief, but temperatures are expected to remain high.
More
Debate
Hosted by:
Patricia Islas
What can be done to protect people against the effects of heatwaves?
In many parts of the world people are increasingly suffering from intense heat. How do you cope with the rising temperatures?
This content was published on
The wage gap between married mothers and fathers in Switzerland is significantly worse than that between single woman and men.
This content was published on
The new "Swiss Football Home" football campus is being built in Thun. The centre, based on an international model, will include pitches for the senior national teams and the headquarters of the Swiss Football Association.
Report identifies gaps in Swiss anti-racism and anti-Semitism measures
This content was published on
Among other things, there are gaps in criminal and civil law protection against racism on the internet, a report published on Tuesday suggests.
You can find an overview of ongoing debates with our journalists here . Please join us!
If you want to start a conversation about a topic raised in this article or want to report factual errors, email us at english@swissinfo.ch.