Number of days that a heat wave lasts under the
user's definition
tempsExceedingCutoff
A vector of 1s and 0s the length of the
number of days in the time series. 1 means the temperature for that
day exceeds the calculated threshold; 0 means it does not exceed the
threshold.
Value
A dataframe containing information about the heat waves for this
series. It contains two columns: hw and hw.number.