It’s getting hotter than 38 degrees Celsius these days in the Andalusian Guadalquivir Valley. Such temperatures are unusual even for Spain at this time of year, which is why the Spanish weather service warned of the heat. The drought in the country – there was hardly any rain in April – has already made Spanish olive oil 60 percent more expensive since the summer. On the other hand, what is happening off the coast remains more of a secret. A marine heat wave is currently being observed in the Mediterranean Sea off the Iberian Peninsula, with unusually high water temperatures.