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?
First large-scale alpine solar plant approved in Switzerland
This content was published on
The approval was met with satisfaction by the project's organisers, but it also brings with it a certain amount of pressure.
Medieval squirrels may have ‘helped spread leprosy’
This content was published on
An examination of squirrel remains in the United Kingdom has opened up interesting questions and possibilities in terms of the history of the disease.
Swiss money laundering office registers record number of reports
This content was published on
The Money Laundering Reporting Office Switzerland (MROS) registered a record number of reports of suspicious activity last year.
Two teens accused of planning terror attack released from custody
This content was published on
The Schaffhausen judiciary has released the two teenagers from custody who allegedly planned bomb attacks in Switzerland.
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.