Texas is currently facing a record-breaking heatwave that has extended into its third week, with temperatures in the broader US South reaching triple digits. As a result, tens of thousands of people are without power and air conditioning, leaving them vulnerable to the extreme heat.

Over 40 million people in the US are under a heat alert, with cities like Corpus Christi experiencing unprecedented heat indices that combine temperature and humidity. Notably, temperatures in Corpus Christi have soared to 125F (51C), while other cities such as Rio Grande Village and Del Rio have reached 118F (47C) and 115F (46C) respectively.

This prolonged heatwave follows a weekend of destructive storms that caused power outages for hundreds of thousands of residents. The heat dome, a phenomenon where trapped hot ocean air settles above Mexico and parts of the US southwest, is responsible for the scorching temperatures and oppressive heat index.

Such conditions are taking a toll on residents, prompting experts to describe the event as intense, widespread, and long-lasting. Scientists have also emphasized the influence of human-caused climate change on these extreme weather events.

Andrew Pershing, the director of climate science at Climate Central, stated that these conditions are more than five times more likely due to climate change. In response to the strain on the power grid caused by increased energy consumption, Texas' power utility has urged residents to conserve energy by reducing their air conditioning usage.

The effects of the heatwave are significant beyond Texas, with other states like New Mexico, Louisiana, Arkansas, Kansas, and Missouri also grappling with scorching heat. Emergency crews in regions like Tulsa, Oklahoma have seen a surge in calls due to heat-related emergencies and power outages.

In Jackson, Mississippi, residents have endured nearly 100 hours without power and air conditioning. These extreme weather conditions pose serious health risks, with an average of 702 heat-related deaths reported in the US each year.

Texas, in particular, has been on high alert due to concerns about extreme weather since the deadly storm in February 2021, which led to a statewide power crisis. However, the Electric Reliability Council of Texas (ERCOT), which operates the state's power grid, has assured residents that there are enough resources to meet the soaring demand.

Nevertheless, the forecast for Houston, the state's biggest city, predicts temperatures exceeding 100 degrees Fahrenheit most days through August. The rising power demand is not limited to Texas; it is expected to break records in other central US states as well.

The Southwest Power Pool (SPP) has already set an all-time high, while the Midcontinent Independent System Operator (MISO) projects record-breaking usage in the coming days. Despite the increased demand, next-day prices at the ERCOT North Hub have dropped, providing some relief for consumers.

Overall, this heatwave and increased power demand serve as a stark reminder of the urgency to address climate change and its impacts on extreme weather events.