Spain Faces Unprecedented Heat Waves This Summer
Spain has just signed its start to the warmest summer in the historical series. Between June 1 and July 15, the average temperature soared to 3.3 ºC above normal, marking an alarming trend in climate patterns.
Multiple Heat Waves in Quick Succession
In just six weeks, Spain has already experienced two official heat waves and is bracing for a third. AEMET, the state meteorological agency, has indicated that another rise in temperatures is on the horizon this Sunday. The concerning question emerges: if we surpass the heat threshold three times within five weeks, could this signify a fundamental shift in climate?
The Uncertainty of the Upcoming Wave
The third wave does not yet officially exist. AEMET has issued a preliminary information note, indicating a general thermal increase, but strict criteria must still be met. AEMET spokesman Rubén del Campo confirmed that temperatures could reach “extraordinarily high” levels, peaking at 44 ºC in the southern regions. However, the precise duration and intensity remain uncertain.
Broader Implications for Climate Trends
What unfolds in the coming days doesn’t change the broader narrative. Not only are we experiencing three or four extreme heat episodes in just a few weeks, but climatologist Jorge Olcina has also pointed out a “Saharan advection at the end of May,” which contributes to what could amount to four episodes over eight weeks.
While the heat may not currently meet the traditional definition of a wave, it aligns perfectly with longstanding trends suggesting a shift in our climate patterns. José Ángel Núñez and Rubén del Campo from AEMET have suggested that the thresholds are rapidly changing, which calls for a re-evaluation of our understanding of climate extremes.
A Worrying Record of Rising Heat Waves
According to AEMET’s own study, Spain recorded 91 heat waves from 2001 to 2025, a striking rise from 43 during the period from 1976 to 2000. Days spent in heat wave conditions have increased from 210 to 510, indicating a troubling trend rather than an isolated incident.

The Human Cost of Heat Waves
And that’s the pressing issue. The ISCIII MoMo system, which tracks excess mortality, attributed 3,649 deaths to heat during the previous summer, the second-highest figure of the decade. Disturbingly, Spain has already surpassed half of that excess mortality before summer’s peak season arrives.
Facing a Rapidly Changing Climate
Meteorology has shown us that sudden shifts can occur at any moment, leaving us to brace for what’s next. The overwhelming sense that the world is evolving faster than our ability to adapt has transformed from mere anxiety to a harsh reality.
Image | Meteociel
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