Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_8 (saffir_simpson_category INTEGER, nhc_advisory_number VARCHAR)
### Question:
What was the highest SaffirSimpson with an NHC advisory of 18?
### Answer:
SELECT MAX(saffir_simpson_category) FROM table_name_8 WHERE nhc_advisory_number = "18"