Heat Advisory
In short
A weather warning issued when high temperatures or heat index values reach levels that could be dangerous to health.
In plain words
It is a notice telling people that it is going to be very hot and humid. This combination makes it harder for the body to cool down, which can lead to illness.
A simple example
A city issues a heat advisory when the temperature hits 35°C with very high humidity, making it feel much hotter than the actual reading.
Why it matters
It helps people prepare by encouraging them to stay hydrated and avoid direct sun. This reduces the risk of serious conditions like heat stroke.
Easy to mix up
Do not confuse this with a heat wave, which is a prolonged period of hot weather rather than a specific warning notice.