Puerto Rico faces high heat and fire risk as Sahara dust spreads, while Spain sees scorching clear skies

On July 4 2026, a heat wave grips Puerto Rico with temperatures near 90 °F (≈32 °C), high humidity and strong east winds of 10‑17 mph. Thick Saharan dust creates hazy conditions over the island and raises fire danger along the southern coast, prompting officials to advise against open‑flame activities. Scattered afternoon showers are possible inland, while marine currents pose moderate swimming hazards.

Across north‑western Spain, forecasts for San Juan de la Rambla, Salvaterra de Miño and Rianxo predict clear, dry skies and very warm temperatures – up to 39 °C in Salvaterra and 37 °C in Rianxo. Humidity will vary from 60 % to over 80 %, and breezes from the east or northeast will reach 12‑35 km/h. No rain is expected, and authorities recommend staying hydrated and seeking shade during the hottest periods.