How Hot in Herndon Saturday? Dangerous Heat Will Get Worse This Weekend

HERNDON, VA — You thought it was hot Friday?! It's about to get worse this weekend, according to the National Weather Service.

An excessive heat warning is in effect from 11 a.m. until 8 p.m. Saturday in Herndon and across Northern Virginia.

The heat index, or "feels like" temperature, is expected to reach or exceed 110 degrees on Saturday in parts of the region, according to the weather service.

Herndon's heat index will reach 110 degrees by 4 p.m., with the temperature at 100 degrees for most of the afternoon.

An excessive heat warning means that a prolonged period of dangerously high temperatures is possible. People in the area should prepare for extreme temperatures.

Heat stroke and other heat-related illnesses are expected, according to the weather service.

Herndon cooling centers include:

• Herndon Fortnightly Library, 768 Center Street
• Herndon Neighborhood Resource Center, 1086 Elden Street
• See more.

Sunday will be another hot one in Herndon, with the heat index at 104 degrees and high temperatures at 95 degrees. Slightly cooler temperatures into the workweek, but it will feel like the mid-90s.