How heat works:
16–25°C: nice
26–30°C: too warm
30+°C: danger zone
How the radio thinks heat works:
16–20°C: chilly
21–25°C: good weather
26–30°C: better weather
30+°C while crops wither and people collapse in the streets: "summer is here and the weather is lovely, sunshine all around, not a cloud or raindrop in sight to ruin your day"