Dyne, Inc.
Most people do not realize that basement window wells can be dangerous to children, adults and pets. "Every year children are injured, sometimes seriously, from falling into window wells. Most children, based on recorded accidents, have been between the ages of 2 and 5..."(City of Naperville, IL, 1998)
Some window wells are as much as eight feet deep, and most window well accidents can be prevented.
Many municipalities agree of the safety risks associated with open window wells.
Your town may require open window wells to be covered. Check with your local building department for details.
Safety Tips
Following are some tips and suggestions to consider:
Can your existing covers hold the weight of an adult? If not, consider purchasing Ultra Protect window well covers which can hold up to 250lbs.

Alert your children and neighbors of potential safety risks.
Some window well covers may move or slip off of the window well. Be sure that your covers are secure and easy to remove from the inside of your basement.
Ultra Protect window well covers feature a patented SAF-T Locking system which opens easily from your basement.
SAF-T Locking System picture