Forecasters with the National Weather Service warn that a heat wave is expected to affect large parts of the United States this week, with conditions especially concerning in central and eastern regions. Multiple outlets report that temperatures are set to rise ahead of the Fourth of July holiday, and that high humidity accompanying the hot air will make it feel significantly hotter than the recorded temperatures.

The coverage also notes that some areas are already experiencing extreme heat. Examples cited include the Phoenix area and parts of central Texas, along with conditions in parts of the southwestern U.S., where temperatures are reported around 100°F (38°C) on Sunday.

In addition to health risks associated with dangerous heat and humidity, forecasters warn of environmental impacts. The Guardian reports that the NWS is warning of severe wildfire conditions developing across much of the western U.S., with new fires reported breaking out in the region. Overall, the articles present an expectation of prolonged high temperatures and humidity through the upcoming week, paired with additional concern about wildfire risk in the west.