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Heat 4/5 high METEOALARM

Heat warning for Genève: level 4/5 issued

Unchanged since the first report last verified 17:28 CEST

Summary

Genève is under a level 4 out of 5 heat warning. High temperatures pose a significant health risk.

What hazard threatens

Persistently high day and night temperatures increase the risk of dehydration, heat stroke and circulatory problems, particularly for the elderly, infants, pregnant women and the sick. The risk of forest and wildfires also rises.

Local weather conditions

Measuring station Genève / Cointrin, 411 m a.s.l., 4 km from the event

Temperature

31.9 °C

When the warning was issued · 29.07.2026 12:00 CEST

Daily maximum

36.1 °C

on the day of the warning

Humidity

30 %

When the warning was issued · 29.07.2026 12:00 CEST

Day of warning and following days

  • Wed 29.07. 36° 19° measured

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

The likelihood of occurrence is assessed as medium and the potential impact as high. Consult the linked guide on protection against heat and drought to prepare effectively.

What to do now

Drink enough fluids and avoid physical exertion and outdoor activity during midday heat. Ventilate rooms at night and in the morning, shade them during the day, look after vulnerable people around you, and observe any outdoor fire bans in effect.

Risk matrix

Event location

Coordinates · WGS84
46.2098° N, 6.1280° E
46°12′35.3″ N   6°07′40.8″ E