Return the total number of deaths and total damange in millions for storms that had a max speed greater than the average.
SELECT sum(number_deaths) ,  sum(damage_millions_USD) FROM storm WHERE max_speed  >  (SELECT avg(max_speed) FROM storm)
total number = SUM(); deaths refer to number_deaths; total damage in millions refers to damage_millions_USD; storms with max speed greater than the average refers to max_speed > AVG(max_speed);