Long Island, New York. The weather has been threatening all day. Humidity builds and wanes like waves. Clouds form on top of clouds, their bulky shape a prediction of what is coming - and then they part briefly to reveal blue sky and sun.

But now we are on the home straight.

The light has decreased. The trees are moving more as breeze shifts to wind. Thunder rumbles in the empty canyons of the clouds above us, shaking the ground with it.

Today’s storm might be arriving earlier than forecast.