Summer means it: a heat dome brings 40 °C and fire risk
The solstice arrived with a heat dome parked over Iberia. Next week gets seriously hot — and the wildfire danger climbs with it.
Summer didn’t knock. Right on cue with Sunday’s solstice, a heat dome has settled over Portugal and Spain — that setup where hot air gets trapped above the peninsula and bakes everything for days on end.
From the start of next week, much of the mainland is set to sit between 35 °C and 40 °C. Inland — the Douro valley, the Tagus valley and deeper Alentejo — could touch or pass 40 °C, with parts of Iberia even flirting with 45 °C. This isn’t a one-afternoon spike: the heat looks set to dig in for several days.
What it means on the ground
With dry ground and plenty of fuel in the scrub, IPMA has rural fire danger at its highest levels across much of the country at least through midweek. By mid-June the EU had already logged more than 105,000 hectares burned in large fires — and that’s before Iberia stepped into the oven. It did not stop there: by 5 August the EU total stood at 505,683 hectares against 379,392 on the same date in 2025.
Plain translation for Portugal: no burning, watch any stray spark, and the usual care for the elderly, kids and anyone working outdoors. Keep water close, grab shade when you can, and save the heavy lifting for early morning or evening.
Enjoy the summer — just keep a cool head, even if the thermometer won’t.
Illustrative · Photo: Jo Kassis / Pexels