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Heat 4/5 high METEOALARM

Heat warning level 4: Préalpes vaudoises

Unchanged since the first report last verified 18:13 CEST

Summary

A level 4 out of 5 heat warning is in effect for the Préalpes vaudoises. Persistently high temperatures are placing significant strain on health and circulation.

What hazard threatens

Persistently high day and night temperatures favour dehydration, heat stroke and circulatory problems, particularly among the elderly, infants, pregnant women and the chronically ill. The risk of forest and wildfires also rises.

Local weather conditions

Measuring station Oron, 828 m a.s.l., 12 km from the event

Temperature

27.6 °C

When the warning was issued · 29.07.2026 12:00 CEST

Daily maximum

31.7 °C

on the day of the warning

Humidity

39 %

When the warning was issued · 29.07.2026 12:00 CEST

Day of warning and following days

  • Wed 29.07. 32° 21° measured Tropical night (from 20 °C)

As of: Values as at the time of the warning; they are not updated afterwards.

Source: MeteoSwiss

Context & protective measures

Background: heat waves are becoming more frequent and intense in Switzerland. The greatest danger is the health burden from persistently high day and night temperatures, which favour dehydration, heat stroke and circulatory problems. The elderly, the chronically ill, pregnant women and infants are particularly at risk.

Recommendation

Likelihood medium, impact high. Keep living spaces cool by ventilating at night and in the morning and shading during the day, avoid physical exertion outdoors during the midday heat, and look after vulnerable people around you.

What to do now

Drink enough, avoid the midday heat outdoors and observe any outdoor fire bans in place. Use the linked guide to prepare effectively.

Risk matrix

Event location

Coordinates · WGS84
46.4743° N, 6.9309° E
46°28′27.4″ N   6°55′51.2″ E