Temperatures keep on climbing across the East Coastpublished at 20:30 BST 4 July
Ben Rich
Lead Weather Presenter
Temperatures have been climbing across the east of the US, with Washington DC climbing above 100F (38C) by 15:00 EDT (20:00 BST). In Baltimore it’s even hotter, with the thermometer hitting 104F (40C).
New York City is slightly less hot: it’s around 92F (33C) in Central Park right now. But it’s still very humid so the heat index – what it actually feels like - is closer to 100F (38C).
This humidity is an important part of what is making this heatwave so brutal and dangerous as it makes it harder for humans to cool down through sweating.
In dry air our sweat is able to evaporate easily, taking energy away from our bodies in the process. Humid air contains more moisture, meaning our sweat evaporates far less effectively.
The advice from the US National Weather Service for those affected by extreme heat is to avoid heavy activity and direct sunlight, stay hydrated and to find a cool indoor place – perhaps easier said than done for those taking part in the 4 July celebrations.


























