Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_48 (heat INTEGER, time VARCHAR, nationality VARCHAR)

### Question ###
What was the highest heat with a time slower than 48.87 from sweden?

### Accurate SQL ###

SELECT MAX(heat) FROM table_name_48 WHERE time > 48.87 AND nationality = "sweden"