A significant heatwave is gripping the United States, prompting worries about upcoming World Cup matches. The extreme temperatures are also a concern for the many Fourth of July celebrations planned across the country. While the article originates from RT.com, it highlights the potential disruption to major sporting and cultural events. Authorities are likely to issue heat advisories and implement safety measures to protect participants and spectators. The severity of the heatwave could lead to cancellations or postponements if conditions become dangerous. Further details on the specific impact and planned responses can be found at RT.com.