Click video. It's the longest spell of hot weather for seven years and there's no sign of it ending - just yet. Good news for many, with tourist attractions across the South having a bumper season.
But for others the tropical temperatures are taking their toll. Coping with the heat throughout the day and with little respite at night is bordering on unbearable. And for some there's simply no escape, as Martin Dowse explains.
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The RMT union has accused Southern of inventing figures which the company claims show record numbers of guards are going sick.
Thursday morning's weather for the west of the region
Thursday morning's weather for the east of the region