Overview
- AEMET confirmed a heat wave affecting Cantabria on Sunday, June 21, and the regional government activated a pre‑emergency as many inland sites topped 30°C.
- Local AEMET‑based forecasts for Galician towns show warm, humid early‑summer conditions with daytime highs often in the high 20s to low 30s and only a low chance of isolated showers or brief storms.
- Mexico’s SMN and CONAGUA, backed by regional Protección Civil bulletins, warned that tropical waves and upper‑level circulations will bring intense, sometimes torrential rains to Veracruz, Oaxaca and Chiapas while the Yucatán Peninsula faces very high temperatures around 36–39°C.
- Argentina’s Servicio Meteorológico Nacional issued yellow alerts for storms, strong winds and Zonda events across several provinces and forecast a polar air mass cooling the Buenos Aires metro area to daytime highs near 13–14°C and cooler nights.
- Authorities urged practical precautions for each region: Cantabria residents to protect against heat and sun exposure, Mexican coastal and mountain communities to prepare for flash flooding and lightning, and Argentines in wind‑prone provinces to secure loose objects and avoid travel during high‑wind or Zonda episodes.