Why are there so many tragedies in the summer?

A friend of mine's child was playing in a driveway near a large box of recycled glass.  Somehow the glass all shattered and spilled on the driveway and the child fell into the glass needing over 40 stiches.  First of all we have to learn that we should be very careful about our recycled glass.  The other message that her Rav told her is that in the summer many people take vacations so there is less Torah learning going on.  Torah learning provides a protection for Klal Yisrael.  Therefore we should all take some time to increase our learning this summer.