The heatwave danger level was raised from 3 to 4 across much of canton Ticino on Wednesday.

La vague de chaleur ne fait que commencer, elle durera jusqu’en fin de semaine, voire davantage. MétéoSuisse a relevé le niveau de danger canicule dans plusieurs régions

The area around Lake Neuchatel, Lake Biel and Lake Murten, along with the central Valais and the Lake Geneva regions have all moved to a high-risk level, said MeteoSwiss.