Willem’s job in such a situation was to be cold-blooded. This wasn’t necessarily in his nature. He was as shocked by all this as anyone else. It wasn’t completely unprecedented. There had been isolated cases of drowning in sea foam during the last few years. It had come up on the emergency services’ radar as something that would become more likely as the temperature of the sea rose and algae—which apparently had something to do with the formation of sea foam—flourished. But a mass casualty event of this type was completely astonishing.