Seville, Spain

In June 2022 Seville launched proMETEO Sevilla, the first system in the world to tie heat-wave forecasts to health outcomes and to name and categorize heat waves the way storms are named. A three-tier categorization weights humidity, nighttime temperatures and the prior 30 days — not just peak daytime heat — and each tier triggers graded municipal responses such as extending public-pool hours and deploying community health workers to check on vulnerable residents. In July 2022 "Zoe" became the world's first officially named heat wave. Names were chosen via behavioral-science focus groups (descending the Spanish alphabet). Built with Arsht-Rock, Spain's AEMET and local universities, it is a near-zero-cost salience tool; it remains a pilot under academic evaluation, and the methodology is being adopted by Athens, Miami, Los Angeles and Melbourne.