Coronavirus updates: CDC forecasts up to 226K US deaths by mid-October

There were 16,096 new COVID-19 cases reported in France on Thursday, marking the highest one-day rise since the beginning of the outbreak, French health authorities said.

The nation now has over 497,000 people diagnosed with COVID-19.

The death toll increased by 52 on Thursday, bringing the fatality total to 31,511.

France reported 4,258 new hospitalizations in the last week, including 718 patients in intensive care.

France on Wednesday announced new restrictions to combat the rise in cases.

Starting Monday in Paris and seven other major cities, outdoor gatherings will be limited to 10 people. Bars must shut their doors at 10 p.m., gyms will be closed and sporting events will be limited to 1,000 spectators.

Marseille, Aix-en-Provence and Guadeloupe are enacting stricter rules; starting Monday all bars and restaurants will be closed.

ABC News' Ibtissem Guenfoud and Christine Theodorou contributed to this report.

The Centers for Disease Control and Prevention forecasts that the U.S. will lose another 3,400 to 7,400 lives to COVID-19 by Oct. 17, bringing the nationwide death toll to between 214,000 and 226,000.

The national death toll currently stands at 202,404, according to Johns Hopkins University.

ABC News' Anne Flaherty contributed to this report.

In Boulder, Colorado, people ages 18 to 22 will soon be banned from all gatherings, whether indoors, outdoors, or with people outside that age range, the Boulder County Public Health Department announced.

This comes after nearly three weeks of cases rising in Boulder County, "with the vast majority" connected to 18 to 22 year olds, "particularly those attending the University of Colorado Boulder," the department said.

"While there has been little evidence of spread of the virus beyond the 18-22 age group, the continued increase in new cases in the city of Boulder prompted the Public Health Order to help prevent the spread to other community members," the department said.

The health department also calls out 36 addresses where the department claims residents "repeatedly engaged in activities that violate public health orders." Those residents must stay in their homes for two weeks, only leaving for essential services, according to the Health Department.

The order will last for two weeks, beginning at 4 p.m. local time on Thursday.

Residents in the 18 to 22 age group are exempt for exercising outside alone, studying outside alone and going to work if they don’t live in one of the homes with stay-at-home requirements.

Young adults can interact with relatives they live with, and those in high school can participate in school activities, the department added.

"While there has been little evidence of spread of the virus beyond the 18-22 age group, the continued increase in new cases in the city of Boulder prompted the Public Health Order to help prevent the spread to other community members," the department said.

ABC News' Jennifer Watts contributed to this report.

The United Kingdom reported 6,634 daily COVID-19 cases on Thursday, reaching a new record high.

The number of hospital admissions is also on the rise.

The U.K. now has over 412,000 coronavirus cases and at least 41,951 fatalities, according to Johns Hopkins data.

ABC News' Mike Trew contributed to this report.