On Friday, including possible tornadoes swept through St. Louis, including possible tornadoes swept across at least four people injured as damage this weekend could be caused by expected strong winds and bad weather.

St. Louis Mayor Cara Spencer confirmed that the storm ripped off roofs of some buildings, tearing off brick-built and fallen trees and power lines while urging residents to be covered up.

According to the National Weather Service, the "very active and complex medium-term weather pattern" will arrive in the U.S. this weekend and at least next Tuesday, resulting in rain, strong winds and abnormal temperatures throughout the U.S. weekend.

Accuweather warned that from Friday to Saturday, about 150 million Americans could be affected by bad weather.

The NWS believes the main risk is large hail, some of which are more than 2 inches in diameter, and wind gusts and tornadoes are damaged.

Throughout the mid-Mississippi, Tennessee and Ohio Valley, severe thunderstorms are expected to continue from Friday to at least Sunday, with some strong supercells, a type of thunderstorm that contains deep and long-lasting spinning upward airflow.

The NWS warns that in the evening and at night, super batteries may have the potential for large hail and tornadoes.

The agency’s storm forecasting center issued a modest risk warning about the bad weather in the Ohio valley below, where several powerful tornadoes are most worried. Meanwhile, the region has already issued a small risk of excessive rainfall.

According to the NWS, residents and travelers should stay aware of the nearest storm shelter or safe place if severe thunderstorms approach.

In addition, tornado watches were released to parts of Illinois, Indiana, Kentucky and Missouri until 10 p.m. Friday. According to the NWS, in addition to wind gusts expected to be up to 80mph (130 km/h), widespread hail may also reach the size of a tennis ball.

As the eastern part of the country is expected to be severely hit by thunderstorms and potential tornadoes, the NWS also warns of unusual early heat waves in South Texas.

Highs are expected to approach record territory and enter the 90s, as well as triple-digit numbers in parts of the region, with weather throughout the weekend raising widespread major heat risks throughout the weekend.

Although triple-digit weather is common in the state during the summer, the early heat of the year is unusual, making Texas hotter than California’s Death Valley, the hottest place on Earth.

In the context of an increasingly severe global climate crisis, severe weather events across the United States are mainly due to human activities, including the burning of fossil fuels. Last year was confirmed as the hottest year on record as carbon emissions reached an all-time high.

Recently, leading climate scientists found that a four-day historical storm that wreaked havoc in the central Mississippi Valley killed 24 people in early April, making the fossil fuel burn even worse.

However, despite the increasing frequency of such bad weather events, Donald Trump’s administration has issued a wave of rollbacks to environmental regulations. Since Trump took office in January, federal websites have also cleared information about climate change and extreme weather events.