Severe weather conditions have forced the immediate evacuation of Freedom 250 attendees at the National Mall in Washington, D.C. The National Weather Service issued a severe thunderstorm watch, warning of heavy winds, lightning, and hail. Consequently, the U.S. Secret Service has temporarily suspended security checkpoints, leaving the schedule for President Donald Trump’s planned "really long" speech and the massive fireworks display in uncertainty. Earlier, extreme heat led to the cancellation of the Independence Day parade. Amidst the celebrations, members of the Patriot Front group marched through the capital chanting "reclaim America." Additionally, the National Park Service warned that the planned launch of over 850,000 pyrotechnic effects could result in "very unhealthy" air pollution levels across central Washington, D.C. during the holiday weekend.