The current fiscal year is shaping up to be the deadliest ever along the border with Mexico, it was reported Wednesday.

As of Tuesday, 366 undocumented immigrants had died near the border, with 18 of the deaths occurring in San Diego County and 29 in Imperial County, according to The San Diego Union-Tribune.

Most of the deaths have occurred in Arizona, with 173 deaths in the U.S. Border Patrol's Tucson sector -- including 65 last month, the newspaper reported.

This year's total is well ahead of last year's count of 330 migrant deaths.

The number is also well ahead of the 310 deaths recorded by this date in the worst year so far, 2000. The final death toll that year was 383.

The Union-Tribune reported that 119 of those who have died this year succumbed to heat-related causes, as smugglers took them through hot and desolate desert areas to avoid detection.

The Border Patrol also reported 2,092 rescues so far this year, compared to 1,347 at this time last year.