YAML

{% if is_state("sensor.dwd_weather_warnings_105334000_current_warning_level", "1") %}
  Wetterwarnungen
{%- elif is_state("sensor.dwd_weather_warnings_105334000_current_warning_level", "2") %}
  Warnungen vor markantem Wetter
{%- elif is_state("sensor.dwd_weather_warnings_105334000_current_warning_level", "3") -%}
  Unwetterwarnungen
{%- elif is_state("sensor.dwd_weather_warnings_105334000_current_warning_level", "4") -%}
  Warnungen vor extremem Unwetter
{% else %}
  Keine Warnungen
{%- endif %}

{% set warning_level = states("sensor.dwd_weather_warnings_105334000_current_warning_level") | float(0) %}
{% if   warning_level == 1 %}Wetterwarnungen
{% elif warning_level == 2 %}Warnungen vor markantem Wetter
{% elif warning_level == 3 %}Unwetterwarnungen
{% elif warning_level == 4 %}Warnungen vor extremem Unwetter
{% else %}Keine Warnungen
{%- endif %}