Washington D.C. is experiencing a surge in emergency medical calls, with a 20 percent increase reported on Wednesday, as temperatures soar above 100 degrees Fahrenheit. Captain Sharon Moulton described the heat as oppressive, leading to calls for heat-related illnesses, including a man found unconscious on a sidewalk. The strain on emergency services is mounting.

This spike in calls occurred as the city braces for tens of thousands of visitors for the nation's 250th anniversary celebrations. Officials anticipate the Fourth of July to be the busiest day of the year for emergency responders. The fire and emergency medical services department is preparing by ensuring ample water supplies and erecting shade tents for attendees.

Chief John A. Donnelly noted that the department had predicted heat but not this intensity. The highest call volume in seven years was recorded on Thursday, with 748 total calls, including 551 for emergency medical assistance. This extreme weather is exacerbating existing health conditions for some individuals, adding complexity to emergency responses.

Emergency services are implementing measures like increased water availability and shade structures to mitigate risks for the large crowds expected. The focus remains on ensuring public safety amidst the challenging conditions and significant influx of visitors.