Heat warnings
The German Weather Service (DWD) uses a two-stage system to warn of heat in the summer months if a certain temperature threshold is exceeded. The decisive factor here is not only the temperature, but also the duration of the heat period and the altitude.
- Heat warning in case of high heat load - if the perceived temperature is above approx. 32 °C and there is also only slight cooling at night
- Heat warning for extreme heat stress - at a perceived temperature above 38 °C
The human body's internal heat balance is designed to maintain a constant temperature of around 37 °C. As the temperature rises, the demands on the cardiovascular system, the musculoskeletal system and the respiratory system increase. The entire body has to work harder to keep the core body temperature constant at 37 °C. The environment is then perceived as stressful and this is referred to as heat stress. The degree of heat stress is felt differently by each person. Population groups whose ability to adapt is limited, so-called heat-vulnerable groups, are often particularly affected.
The DWD issues early warnings of hot days by newsletter. The service is free to subscribe to and can also be used via app. The DWD issues a heat warning whenever severe heat is forecast for at least two days in a row and increased exposure is to be expected during the night due to heated indoor areas.
> Newsletter German Weather Service Heat Warnings
> WarnWettter-App German Weather Service