Answer:
Celsius
Explanation:
The temperature of 42 degrees in Chicago, that has been recorded as a day's temperature record high for the month of August, is in Celsius degrees. The reason why the assumption is that it is Celsius degrees in question is that 42 degrees is a temperature that can be reached in the continental parts, it is a very high temperature, and if it is 42 degrees in the other scale, the Fahrenheit scale, then this temperature will actually be relatively low, far away from a record breaking high.
The Celsius scale is used globally, except in few countries, one of which is actually the United States. It is part of the SI units. The basic characteristics of this scale are that it starts from 0 degrees, and everything above it is a plus temperature, while everything below it is a minus temperature. The water freezes below 0 degrees, while it evaporates at 100 degrees.
