Baltimore, MD - July 10, 2026 - More than 470 heat-related emergency room visits were reported during last week’s Independence Day heat wave, more ER visits in one week than had been recorded for the entire heat season that began in May, according to new data.

State officials had warned last week of potential health problems from the record high temperatures, which hit triple digits on several days.  And Wednesday’s update of the Weather-Related Illness Data Dashboard from the Maryland Department of Health confirmed it.

From the start of the annual heat season in May through last week, there had been 916 heat-related emergency room or urgent care visits. But more than half of those cases, 473, occurred last week, from June 28 to July 4.

The dashboard also reports 935 calls for heat-related emergency medical services so far this summer, with half of those calls occurring last week as well.... Read More: Maryland Matters