An algal bloom causing toxic foam and fish kills along South Australia's beaches prompts holiday-makers to consider alternative summer travel plans.

Some South Australian farmers say they are still feeling the strain of drought after inconsistent winter rains left little room for recovery before the coming summer.

A week of large-scale land and air searches have found no clues leading to the whereabouts of four-year-old Gus in outback South Australia.

South Australia produces 80 per cent of Australia's fresh potatoes, but extreme weather and drought across the state are causing a major shortage. 

Regional politicians unanimously condemn Qantas over the impending closure of its Mildura crew base, saying it underscores the city's vulnerability to the "whims" of private transport companies.

While industry and government tell consumers South Australian seafood is safe, consumer demand is still down amid the algal bloom, with businesses concerned they may not survive.

Valerie's disappearance on South Australia's Kangaroo Island unleashed a 529-day hunt. She dodged rescue attempts and traps and had some wondering whether the sausage dog was mocking them and having the time of her life.