Heat Records
Highest Temperature Records Explained: Heat Domes, Deserts, Sensors, and Verification
Why extreme heat records happen, how official high temperatures are measured, and why sensor siting matters.
Quick answer: Highest temperature records usually require intense sunshine, dry ground, sinking air, favorable terrain, and a properly exposed thermometer.
Heat setup
Heat domes, dry soils, downslope winds, and desert basins can all support extreme high temperatures.
Clouds, humidity, vegetation, and sea breezes can limit records.
Measurement details
Official thermometers are shielded and ventilated to measure air temperature rather than direct sunlight or hot surfaces.
Poorly placed sensors near pavement or walls can read too high.
Climate context
A single record is weather, but changing record frequency can reveal climate signals.
That is why long-term datasets matter.