A warning sign to stay on the trail to the historic Agate House in Petrified Forest National Park, Arizona, United States of America, North America

A warning sign to stay on the trail to the historic Agate House in Petrified Forest National Park, Arizona, United States of America, North America

Desert mountain landscape surrounding Entallada lighthouse overlooking the ocean, Fuerteventura, Canary Islands, Spain, Atlantic, Europe

An extreme heat danger sign in Death Valley which is the lowest, hottest, driest place in the USA, with an average annual rainfall of around 2 inches, some years it does not receive any rain at all.

A TV weather forecast, forecasting a heat wave in the United Kingdom, Europe

A TV weather forecast, forecasting a heat wave in the United Kingdom, Europe

Shield, 100 degrees Celsius, warns of boiling hot water, geothermal area Reykjadalur, Hverageroi, Hveragerdi, Iceland, Europe

Heat warning for hikers in the White Domes Loop, Valley of Fire State Park, Nevada, USA, North America

Warning Sign Fallow Deers crossing the Road during the rut (Cervus dama - Dama dama) - male

Warning sign in front of Europe's largest hot water spring, Kleppjarnsreykir, Iceland