The largest hailstone ever recorded in the U.S. was a 7-inch chunk of football-shaped ice found in Aurora, NE, on June 22, 2003. Instances like this one are uncommon, but hail and hailstorms aren't.

Every year about $1 billion in hail-related damage to property is reported across the United States, according to insurance industry statistics. New impact-resistant building materials can help minimize damage from hailstorms.

The Institute for Business and Home Safety recommends some basic care and maintenance tips for roofs:

• Inspect your roof for curling shingles and small leaks that can lead to larger problems.
• Make sure you have adequate eave and ridge ventilation, to reduce buildup of heat and moisture.
• Keep trees trimmed to prevent them from rubbing on a roof or from providing excess shade.
• Keep roof, gutters and downspouts free of leaves, twigs and other litter.
• Repair or replace existing roofs to make them stronger and more weather resistant.

If a hailstorm strikes:

• Stay indoors, away from skylights and doors.
• Close drapes and windows to prevent broken glass from flying inside.

If you are caught driving during a hailstorm:

• Turn on your headlights (low beams) and slow down.
• Allow extra distance for braking.
• If possible, pull into a garage or under a shelter to minimize hail damage.
• If you find glass damage, carefully remove any glass from the interior of your vehicle and cover the damaged area to prevent further water damage.