Thunderstorm, also called an electrical storm or lightning storm, is a form of weather characterized by the presence of lightning and its attendant thunder. The lightning in a thunderstorm is caused by an electrical charge that builds up inside the storm due to the movement of water droplets or crystals carried by the wind. Thunderstorms are usually accompanied by heavy rainfall (heavy downpours), strong winds, hail, and sometimes tornadoes.

Tips:

 ·Get prepared for strong wind and thunder and lightening.
 ·Stay indoors and close windows and doors.
 ·Strengthen facilities at ports to prevent ships from going astray or colliding each other.
 ·Outdoor people working in high place, water field, and open ground should stop working immediately.

Suggestions:

 ·Do not take a bath during thunder and lightening weather. Never use solar energy water heater to take a bath.