The Met Office has issued a wind warning for part of the UK with gusts of 50mph expected to batter towns for 36 hours.
The yellow warning for wind is in place across Devon and Cornwall in south-west England.
Forecasters have warned that road, rail, air and ferry transport will "likely" be disrupted by strong winds.
The new warning was issued after thunderstorms battered parts of the country earlier this week.
Britons are set to bask in hot and humid weather, with highs of more than 30C expected this weekend amid a heatwave across much of Europe.
The Met Office said: "Easterly winds will become increasingly gusty on Wednesday night and remain so through Thursday and into Friday.
"Winds will be particularly gusty over and to the west of high ground with gusts reaching 35 to 40mph widely and as high as 45 to 50mph very locally."
The warning is in place from 12.01am on Thursday to 12pm on Friday.
The "likely" impacts include some delays to road, rail, air and ferry transport, the Met Office said.
Bus and train services will "probably" be disrupted, and drivers of high-sided vehicles should expect delays on exposed routes and bridges.
Temperatures are set to soar in parts of the UK as very hot air from Africa is pulled north over Europe.
Emergency measures have been triggered in France amid fears that the heatwave could be deadly.
Britain will likely see highs above 30C on Friday and Saturday as a number of major events, including Glastonbury Festival, are held.
Highs of 30C could be seen for eastern parts as far north as Yorkshire.
Temperatures will be in the upper 20s for revellers at Glastonbury.
Met Office forecaster Matthew Box said: "There is an enormous reservoir of warm air across Europe at the moment.
"On Friday we will have high pressure over the UK and low pressure out in the Atlantic, and that will bring settled weather conditions across the UK and an easterly flow of air across the southern half of the country.
"Those easterly winds are drawing that warm air from the near continent and that reservoir across the UK and that's why we're getting those warm temperatures.
"We are looking at 28 or 29 degrees, perhaps peaking at 30 here or there on Friday and that will be across western or south-western parts of the UK.
"Then we could see 30 or 31 across eastern areas of England; London and the Home Counties through Lincolnshire and parts of Yorkshire, on Saturday."
The Met Office has urged those attending the music festival at Worthy Farm in Somerset to take extra precautions such as sunscreen and to seek shelter from the sunshine due to high UV levels.
In 2017, the Wednesday of Glastonbury was the hottest day in the event's history, with temperatures hitting 31C (88F) and leading to dozens of people being treated by paramedics.
However, only eight years of the festival - including the first Glastonbury in 1970 - have not seen any rain.
