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Heat 4/5 high METEOALARM

Heat warning level 4: Zug-Knonau

Unchanged since the first report last verified 18:13 CEST

Summary

A level 4 out of 5 heat warning is in effect for Zug-Knonau. Persistently high temperatures are placing a significant strain on health and circulation.

What hazard threatens

The sustained heat places heavy strain on the body and circulation, particularly for the elderly, infants and the sick. The risk of forest and wildfires also rises notably.

Local weather conditions

Measuring station Cham, 443 m a.s.l., 3 km from the event

Temperature

30.5 °C

When the warning was issued · 29.07.2026 12:00 CEST

Daily maximum

35.8 °C

on the day of the warning

Humidity

42 %

When the warning was issued · 29.07.2026 12:00 CEST

Day of warning and following days

  • Wed 29.07. 36° 18° 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 is rated medium, the impact high. Background: heat waves are becoming more frequent and intense in Switzerland. The elderly, chronically ill, pregnant women and infants face particular risk of dehydration, heat stroke and circulatory problems.

What to do now

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

Risk matrix

Event location

Coordinates · WGS84
47.1983° N, 8.4962° E
47°11′53.9″ N   8°29′46.4″ E