Sebastian Kennerknecht / River joined by water from hot spring causing white sulphur deposits, Tawau Hills Park, Sabah, Borneo, Malaysia

Winfried Wisniewski / Blue Wildebeest (Connochaetes taurinus) herd with Burchell's Zebra (Equus burchellii) and tourists in landrover and hot air balloon, Masai Mara, Kenya

Rick Tomlinson / Fleet including "Hot Rats", "White Heather", "Conteza", "Little Spirit" and "Firebird of St Helier". Cowes Week, August 2009.

Kirkendall-Spring / Winter landscape in the Lower Terrace area of Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA, February 2011

Kirkendall-Spring / Winter landscape in the Lower Terrace area of Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA, February 2011

Jeff Vanuga / Thermal pools and hot springs along White Creek in the Lower Geyser Baisn area of Yellowstone National Park, Wyoming. June 2010.

Jeff Vanuga / Thermal pools and hot springs along White Creek in the Lower Geyser Basin area of Yellowstone National Park, Wyoming. June 2010.

Nick Upton / Herd of domestic sheep (Ovis aries) resting in the shade of a Norway maple tree (Acer platanoides) on a hot summer day. Gloucestershire, UK, June 2010

Jerry Monkman / Rainstorm lit by the midnight sun in the White Mountains, North of Fairbanks, near Circle Hot Springs, Pinnell Mountain Trail, Alaska, USA

Jason Smalley / English Setter hunting for grouse on Yorkshire moorland, panting in heat of summer, UK

Richard Du Toit / Lesser Flamingo (Phoenicopterus minor) group and White Pelicans (Pelecanus onocrotalus) near Laburu Hot Springs, Lake Bogoria, Kenya

Konrad Wothe / Yuccas growing in gypsum sand dunes, White Sands National Park, New Mexico