The Met Office warns that homes will stay very warm at night due to high humidity.

The UK is experiencing a heatwave with record temperatures and red alerts. This heatwave feels worse than others due to different conditions.

The Met Office says nighttime temperatures are a concern, making it hard for people and buildings to cool down.

Forecaster Aiden McGivern says nighttime temperatures are a problem because they stay high after dark. He says, 'It's not just daytime temperatures, it's also nighttime temperatures.' 'Buildings and homes won't cool down at night.' 'We won't cool down much because of high humidity.'

Weather warnings are in place for Wednesday, Thursday, and Friday.

High humidity means we can't cool down as much.

McGivern says humidity changes how heat feels, especially compared to past hot spells. He says, 'It feels different with humidity.' 'The heat index is much higher.'

The Met Office focuses on the heat index, not just thermometer numbers. McGivern says, 'We're concerned about the heat index.' 'Heat and humidity combined cause severe impacts.' 'It's not just the temperature.'

Many days of high temperatures affect people's sleep and homes' heat retention. McGivern says, 'It's the day-by-day effects of heat that keep buildings warm.'

Temperatures are high due to a 'heat-dome' over western Europe.

The hottest temperatures are expected on Wednesday and Thursday, with warnings in place.

Extreme heat and humidity could impact public health, infrastructure, and supplies, causing heat-related issues.

There could be more water safety incidents as people visit coastal areas, lakes, or rivers.