ATTENTION: HEAT ADVISORY (COME AT YOUR OWN RISK)
COME AT YOUR OWN RISK!!
A code red air quality alert means that air pollution concentrations within the region are unhealthful for the general population. The effects of air pollution can be minimized by avoiding strenuous activity or exercise outdoors.
Today is supposed to be a high of 98 (without humidity added in; which is 89%). Heat index today of 110. Tomorrow is supposed to be even hotter at 102 degrees (meteorologists predict that the head index will be near 115 tomorrow). We suggest that you do not come in this heat, but if you absolutely have to, please please please be smart.
Heat and humidity add up to danger
High humidity makes heat more dangerous because it slows the evaporation of perspiration – the body's natural cooler.
To use the chart below to find the danger level at a particular time and place, type in the name of a city or town anywhere in the world in the box at the bottom of this page. Click the "Go" button to see a report of the place's latest weather conditions and forecasts Use the Fahrenheit temperature and the relative humidity in the current conditions report with the chart below to find the apparent temperature.
Links to more information are below the chart.
Source: National Oceanic and Atmospheric Administration
The chart above is based on a formula. The USATODAY.com Humidity calculations page has the formula and a link to a worked-out example. You can also use the weather calculator on the National Weather Service's Medford, Ore., office's Web site to find the apparent temperature.
Posted on Thu, July 21, 2011