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Heat 5/5 very high METEOALARM

Riviera: extreme heat warning, level 5 of 5

Unchanged since the first report last verified 17:28 CEST

Summary

A level 5 out of 5 heat warning is in effect for Riviera. The elderly, infants and the sick are particularly at risk.

What hazard threatens

Persistently high day and night temperatures place major strain on circulation and health, especially for the elderly, infants and the sick; the risk of forest and wildfires also rises.

Local weather conditions

Measuring station Biasca, 278 m a.s.l., 1 km from the event

Temperature

31.7 °C

When the warning was issued · 29.07.2026 12:00 CEST

Daily maximum

35.2 °C

on the day of the warning

Humidity

47 %

When the warning was issued · 29.07.2026 12:00 CEST

Day of warning and following days

  • Wed 29.07. 35° 20° 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 high and impact very high. Prepare using the guide on protection against heat and drought.

What to do now

Drink enough, avoid the 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 outdoor fire bans.

Risk matrix

Event location

Coordinates · WGS84
46.3284° N, 8.9789° E
46°19′42.4″ N   8°58′43.9″ E