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Heat 4/5 high METEOALARM

Heat warning level 4 hits Limmattal

Unchanged since the first report last verified 18:13 CEST

Summary

A level 4 out of 5 heat warning is in effect for Limmattal. Persistently high temperatures are straining health and circulation.

What hazard threatens

Persistently high day and night temperatures place heavy strain on circulation and health, particularly for the elderly, infants and the sick; the risk of forest and wildland fires also increases.

Local weather conditions

Measuring station Lägern, 845 m a.s.l., 5 km from the event

Temperature

26.4 °C

When the warning was issued · 29.07.2026 12:00 CEST

Daily maximum

31.9 °C

on the day of the warning

Humidity

46 %

When the warning was issued · 29.07.2026 12:00 CEST

Day of warning and following days

  • Wed 29.07. 32° 22° 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 is assessed as medium and potential impact as high. Prepare early for the heat burden, paying particular attention to vulnerable people around you.

What to do now

Drink enough fluids, avoid midday heat and physical exertion outdoors. Ventilate rooms at night and in the morning, shade them during the day, check on vulnerable people nearby, and observe outdoor fire bans.

Risk matrix

Event location

Coordinates · WGS84
47.4394° N, 8.3820° E
47°26′22.0″ N   8°22′55.1″ E