Not quite. Weather forecast is focused on, well, weather, whereas a heat-health warning system is basically an early warning when adverse temperatures are likely to impact on the health and wellbeing of the population [0]. Whilst weather forecast will tell us how warm it will likely be, heat-health warning systems will tell us of potential health impacts; their main goal is to reduce heat-related morbidity and mortality [1].

On whether it's "climate slop", as one misinformed user appears to suggest - it definitely isn't. In the UK there's an official alert dashboard for this [2] and the national weather and climate service (Met Office) has a short guide explaining how it works [3].

(With so many people denying how reality works I sometimes wonder if we shouldn't in fact let it all burn. It's beyond depressing.)

[0] https://www.gov.uk/guidance/weather-health-alerting-system

[1] https://pmc.ncbi.nlm.nih.gov/articles/PMC12367936/

[2] https://ukhsa-dashboard.data.gov.uk/weather-health-alerts/he...

[3] https://weather.metoffice.gov.uk/warnings-and-advice/seasona...