A temperature that is ordinary in one region can be dangerous in another, so warnings are usually local.
Compared with normal
Many weather services define a heatwave by how far temperatures rise above the usual for that place and time of year.
Nights matter too
Warm nights stop the body recovering, so they often count towards a warning.
What to do
Drink water, avoid the hottest hours outdoors and check on people who are more vulnerable to heat.
Sources and corrections. This article draws on the sources listed here. Spotted a mistake? and we will correct it.
- 1 Sample source: background reference
- 2 Sample source: official or primary document
- 3 Sample source: explainer from another publisher (facts only)
