Given the persistence of high temperatures above 100 degrees through Monday, along with a gradual increase in relative humidity, an upgrade from a heat advisory to an excessive heat warning was warranted, according to the National Weather Service.
High temperatures will range from 100 degrees and possibly up to 110 degrees. Maximum heat index values will be similar to actual air temperature, around 105 degrees.
An excessive heat warning means that a period of prolonged dangerously hot temperatures and high humidity will create a dangerous situation in which heat illnesses are likely. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun and check on pets, relatives and neighbors.
A heat advisory is in effect from 1 p.m. this afternoon until 7 p.m. Sunday. The forecast high for today is 105 degrees, Friday's forecast is for 108 degrees and Saturday and Sunday are for 104 and 105 degrees respectively. Forecasters are predicting the highest all-time ever temperature for our area to occur on Friday. Not since the mid 1930's has a heat wave of this many consecutive days threatened our area. Take extra precautions if you work or spend time outdoors. Keep a close eye on pets and on the elderly and reduce outdoor activity during hours of peak heat.