Very high temperatures, low humidity and strong winds have combined to create a fierce wildfire in the US state of Arizona.
Officials have ordered the evacuations of more than 50 homes in several communities as firefighters try to control the blaze.
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Weather: Heavy rain and strong winds in the north
His representatives said Cassidy, who was hospitalised last week, died "surrounded by those he loved."
The company’s recently appointed Chief Executive Dara Khosrowshahi said the breach was made by two individuals outside the company.