Bad weather is not suitable for swimming, something.

Bad weather such as thunderstorm, strong wind and sudden change of weather is not suitable for swimming.

As follows:

Swimming is that people float upward under the buoyancy of water and move regularly through their limbs with the help of buoyancy. Swimming can be divided into competitive swimming and practical swimming. Competitive swimming is the second largest event in the Olympic Games, including butterfly, backstroke, breaststroke, agility and synchronized swimming. Practical swimming includes military swimming, water rescue and snorkeling.

Early swimming activities are often regarded as an important part of the education of aristocratic children and the training of soldiers. The ancient Romans built huge baths, and swimming became a social activity in the upper class. At the end of 18, the opportunities for workers to swim increased, and swimming began to become a universal sport.

Extreme weather is a kind of rare weather phenomenon that destroys human society and ecosystem. Extreme weather on the weather scale includes extreme high temperature, extreme low temperature, extreme precipitation and extreme drought. Small and medium-scale extreme weather includes hail, strong wind, tornado, thunderstorm and tropical cyclone.

Extreme weather can be defined by statistical frequency or observed value. In a climate interval of 30 years, weather phenomena with daily frequency less than 10% can be defined as extreme weather. If the observation indexes of a single weather event, such as air temperature, air pressure and wind speed, exceed a given threshold, it can also be defined as extreme weather.

Extreme weather refers to a small probability event that the weather and climate state seriously deviates from its average state, once every few decades or even once in a hundred years. Extreme weather events mean that the state of weather (climate) seriously deviates from its average state, which is statistically unlikely to happen. Generally speaking, extreme weather and climate events refer to small probability events that occur once every 50 years or once every 100 years.

From the perspective of probability theory, if the temperature in a certain area or place is normally distributed under the average condition for many years, the probability of weather is the highest, the probability of hot and cold weather is small, and the probability of extremely cold or hot weather is even smaller.