1. If you are at home, be sure to stay away from doors, windows and external walls of houses and hide in the wall or small room opposite the tornado. Basement or semi-basement is the safest place to avoid tornadoes.

2. In case of emergency such as pole collapse and house collapse, cut off the power supply in time to prevent electric shock or fire.

3. When there is a tornado outside the venue, you should look for low-lying land nearby, but stay away from trees, telephone poles, billboards, fences, etc. To avoid being smashed, crushed or electrocuted.

4. When going out by car and encountering a tornado, you should drive in the opposite direction to avoid it, or leave the car immediately and take refuge in a low-lying place.

Brief introduction of tornado:

Tornado, that is, a funnel-shaped cloud column extending from the cumulonimbus cloud, is an upright hollow rotating airflow between the bottom of the upright cloud system and the underlying surface. It is a local severe weather phenomenon, and tornadoes can be seen in tropical and temperate regions.

Including the American inland, Western Australia, and the northeastern part of the Indian Peninsula. Tornadoes are seasonally weak and can occur in spring, summer and autumn, usually at the turn of spring and summer or at the turn of summer and autumn, with the former being the majority.

According to the shape and environment, tornadoes can be divided into multi-vortex tornadoes, land dragons and waterspouts. Tornadoes usually have a wind speed of 30 to 130m per second, a diameter of less than 2km, an activity range of 0 to 25km and a duration of about 10min. The intensity of tornadoes can be divided into five grades according to the enhanced Fujita series.

Sandstorms and fire cyclones are cyclones similar to tornadoes, but they are not tornadoes. The conditions of tornado production include near-surface wind shear, vertical motion and energy instability. Thunderstorm is an ideal environment that can meet the above conditions, and it is also the main cause of tornado.

Among them, the tornado caused by supercell is called supercell tornado, and other cases are called non-supercell tornado. Supercell tornadoes account for 80% of the total number of tornadoes, and their intensity and development scale are usually larger than those of non-supercell tornadoes. Tornado is a meteorological disaster, and modern weather forecast can give early warning to tornado through high-frequency observation.

But the forecast experience is very demanding. In addition, some areas also carry out manual observation and data collection of tornadoes, that is, storm tracking projects.