A dangerous heat dome is building across the Central and Eastern U.S. this week, bringing multiple days of brutal heat and humidity across the region. Some daily records are threatened, and widespread heat indices of 100 to 110 degrees are forecast. Nighttime lows will also be very warm, bringing little heat relief. Extreme heat watches and warnings are in place across much of the region. This heat dome will be long lasting and widespread, so ensure you have safety precautions in place to avoid heat exhaustion. Watch for the latest forecast.