What is the main idea of the news item? [originaltext] The Italian coastguard

The Italian coastguard says it’s rescued more than 700 people in the last two days from boats carrying migrants and refugees.
    This is the time of year when Italians expect to see migrants landing on their southern shores.(3)In the summer months, the seas are calmer and more people attempted to take their chance in rickety boats setting out from North Africa in search of better lives in Europe. Vessels land in Italy almost every day, but the numbers coming over the past 48 hours have been particularly high. Many of these people were from Nigeria, Ghana and Eritrea.