MARGATE, ENGLAND - AUGUST 16: Margate rock and sweets on sale in a shop on August 16, 2016 in Margate, England. British holidaymakers and overseas visitors flock to British seaside towns to enjoy the warm weather today. After Britain's vote to leave the European Union there has been a rise in Britons taking 'staycations' as a result of the fall in the pound. (Photo by Jack Taylor/Getty Images)

This NOAA image obtained August 16, 2016, captured by the GOES-East satellite on the morning of August 15, 2016, shows a stalled front, stretching from the US Texas Coast to the Ohio Valley. According to NOAA's National Weather Service,a large amount of tropical moisture is expected to pool along the quasi-stationary front causing showers and thunderstorms to develop along and near the boundary through the evening of August 16 into August 17, 2016. As many as 30,000 people have been rescued following unprecedented floods in the southern US state of Louisiana, including a 78-year-old woman who spent a night stranded in a tree, police said late Monday. / AFP PHOTO / NOAA / Handout / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / NOAA" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS HANDOUT/AFP/Getty Images

MARGATE, ENGLAND - AUGUST 16: People advertising Dreamland amusement park play music and carry a placard along the promenade on August 16, 2016 in Margate, England. British holidaymakers and overseas visitors flock to British seaside towns to enjoy the warm weather today. After Britain's vote to leave the European Union there has been a rise in Britons taking 'staycations' as a result of the fall in the pound. (Photo by Jack Taylor/Getty Images)

MARGATE, ENGLAND - AUGUST 16: People sunbathe and play in the sea on Margate Beach on August 16, 2016 in Margate, England. British holidaymakers and overseas visitors flock to British seaside towns to enjoy the warm weather today. After Britain's vote to leave the European Union there has been a rise in Britons taking 'staycations' as a result of the fall in the pound. (Photo by Jack Taylor/Getty Images)

MARGATE, ENGLAND - AUGUST 16: A union jack flag flies near deckchair hut on Margate Beach on August 16, 2016 in Margate, England. British holidaymakers and overseas visitors flock to British seaside towns to enjoy the warm weather today. After Britain's vote to leave the European Union there has been a rise in Britons taking 'staycations' as a result of the fall in the pound. (Photo by Jack Taylor/Getty Images)

MARGATE, ENGLAND - AUGUST 16: People sunbathe and play games on Margate Beach on August 16, 2016 in Margate, England. British holidaymakers and overseas visitors flock to British seaside towns to enjoy the warm weather today. After Britain's vote to leave the European Union there has been a rise in Britons taking 'staycations' as a result of the fall in the pound. (Photo by Jack Taylor/Getty Images)

MARGATE, ENGLAND - AUGUST 16: People sunbathe and play games on Margate Beach on August 16, 2016 in Margate, England. British holidaymakers and overseas visitors flock to British seaside towns to enjoy the warm weather today. After Britain's vote to leave the European Union there has been a rise in Britons taking 'staycations' as a result of the fall in the pound. (Photo by Jack Taylor/Getty Images)

MARGATE, ENGLAND - AUGUST 16: Cars fill the Dreamland amusement park car park on August 16, 2016 in Margate, England. British holidaymakers and overseas visitors flock to British seaside towns to enjoy the warm weather today. After Britain's vote to leave the European Union there has been a rise in Britons taking 'staycations' as a result of the fall in the pound. (Photo by Jack Taylor/Getty Images)