What causes the mysterious wind coming from the Klopeks house?

If you've seen 'The 'Burbs" you know what I'm talking about. I've watched the movie and what striked me as odd was in the beginning when Ray Peterson walked over to the property line of the Klopeks and as soon as he stepped onto their brown grass the wind kicks up and the lights in the basement go out. Then as soon as he steps off the grass the wind stops. What is the reason behind this?