AUSTIN, Texas — Texas has surpassed 10,000 confirmed coronavirus deaths as the lingering toll of a massive summer outbreak continues.

Texas on Monday joined New York, New Jersey and California as the other states to reach the grim milestone. Florida is also close behind.

Roughly four in every five of those deaths in Texas were reported after June 1. Texas embarked on one of the fastest reopenings in the country in May before an ensuing surge in cases forced Republican Gov. Greg Abbott to backtrack and impose a statewide mask order.

August has seen an improving outlook, including a sharp decline in hospitalizations. But Texas officials are now concerned that not enough people are seeking tests.

Health experts have also expressed concerns that recent encouraging trends could be fragile as Texas schools begin reopening for 5 million students across the state.