Geneva recorded its hottest 23 June on record yesterday, hitting 36, shattering the previous mark of 35.6 set in 2003.
Payerne reached the same level, while Zurich, Chur and Lucerne all climbed past 33.
MeteoSwiss says the run of tropical days will be unusually long, with no real relief expected before the weekend.
Authorities are urging residents to drink plenty of fluids, seek out cool places and check on the elderly as the heatwave shows no sign of breaking.
Emergency measures in place
The record-breaking heatwave is forcing authorities to take emergency measures.
Glacier melt 'alarming'
The glaciers are losing water at an alarming rate as the heatwave drags on.
Too hot for nuclear station
The Beznau nuclear plant will be shut down today, as the Aare river has reached the 25-degree threshold.
Massive mudslide hits French hamlet
A torrential mudslide swept through the Haute-Savoie hamlet of Chéron Wednesday night, hitting five of its eleven houses and forcing the evacuation of 21 residents.
Vote to be held on rent controls
The Swiss Tenants' Association has secured the 140,000 signatures it needed to force a national vote on abusive rents.
What to tip?
A new study has put a number on what most diners only guess at — 5 to 10% is the going rate for a tip in a Swiss restaurant.
